Based on the sentence, we can tell that the correct answer should be a word that means "something that gets in the way" that Susan B. Anthony would have to overcome. "Obstacles" is the correct answer because it means something that opposes or stands in the way of progress.

Incorrect Answers:

"Legislation" means laws. Even though the laws of Susan B. Anthony's time were in the way of women getting the right to vote, "legislation" is a singular word that would make this sentence grammatically incorrect. The word "many" must be followed by a plural word.

"Innovation" means something newly introduced, as in the sentence, "Recent technological innovations include laptop computers, tablets, and smartphones."

A "trait" is a distinguishing feature, such as someone's personality or physical appearance, as in the sentence, "Kai has many wonderful traits, and she is most well-known for her kindness and humor."

We know that the word that goes in the blank needs to mean something like "ability to exercise for hours," so the correct answer is "endurance," which means ability to do something for an extended period of time. "Swinging," "swimming," and "jumping" all have to do with specific sports, and we aren't told that the "athletes" being discussed in the sentence play a specific sport. "Endurance" is the only word that refers to athletes in general staying in shape. 

The correct answer is "climate," which means the weather, temperature, and moisture levels experienced in a region. "Heat" wouldn't make sense because the sense describes the blank as "colder," and "humidity" (amount of moisture in the air) doesn't make sense either. "Wind" could be described as "colder," but "climate" is the better choice because one might to hear about the "climate of Wisconsin" more often than the "wind of Wisconsin," because it is the more general term.

The correct answer is "impact." In this sentence, "impact" means a strong influence over someone.  The other words do not make sense in the sentence.

The correct answer is "generosity." "Generosity" is the quality of being kind or generous. The other answer choices are not qualities people would want in friend, so none of them fit the context of the sentence.   

A prodigy is a child with extraordinary talent.  Mary-Lou is a prodigy because she is internationally recognized for her talents at a young age. 

When rules are broken, the result is often a consequence like being grounded or going to the principal's office. "Consequence" means result, and is often specifically used to refer to the results of breaking rules.

A "vigilante" is someone who takes the law into his or her own hands. When the character chases the villains that the police cannot capture, he is taking the law into his own hands. The sentence says nothing to suggest that the character is a police officer or agent of some kind, and "innocent" and "musician" are nonsensical answer choices in this context.

This question is one in which filling in the blank with each answer is useful for finding the best word for the sentence. "Exercise" and "solution" don't make sense in the context of the mom's busy, hectic day. "Interruption" sort of works, but as it means a pause without necessarily implying rest, it doesn't quite fit. A "breather" is a break, or a rest. The busy mom needs a rest, so "breather" is the best answer choice and the correct answer.

"Tenacity" means the quality of sticking to doing something, no matter what happens. A gymnast completing her routine while injured shows tenacity. "Stupidity" doesn't work in context with "amazing" (see sentence). "Cowardice" and "sleepiness" don't make sense in the sentence either; "cowardice" means timidity or fear and is the opposite of "tenacity."