The Edict of Milan, which established religious tolerance of Christians in the Roman Empire, was issued during the reign of Constantine I in 313 CE.

The word, "muse" comes from the Greek word mousike, which means the art of music. The muses in ancient Roman literature are the carriers of music. Pottery and paintings were not around until much later in roman history through mosaics and other visual representations. Music from the muses was a large and important concept in Roman history. We can eliminate doctor and manual labor as these careers did not contribute back to the "arts"

The Byzantine Empire was characterized by religious panel paintings. The Ottoman Empire followed the Byzantine and was notable for the destruction of many panel paintings such as this one. If you chose Julio-Claudian or Ottoman, remember to consider the time frame of when such paintings would have been popular.  Also remember that Caesar's empire was long before the Byzantine paintings. 

Image is in the public domain, accessed via Wikipedia Media Commons: https://it.wikipedia.org/wiki/Monastero_di_Santa_Caterina_(Egitto)#/media/File:Transfiguration_of_Christ_Icon_Sinai_12th_century.jpg

The Acta Diurna (Daily Acts) was a newspaper that was published in Rome beginning in the second century BCE. The purpose of the Acta Diurna was to inform the Roman population about Roman military campaigns, births and deaths of important people, and public gatherings.

The only correct answer here is the British expedition which marks the end of Constantine's favorable rule over Rome. The Hun expedition did not occur until Theodosius took reign. You may have chosen the Armenian expedition because of the close geographic location of the countries. If you chose the Viking option, remember to think about the time frame of Constantine's rule

The Crisis of the Third Century had made it abundantly clear to Rome’s ruling class that the size of the empire had grown too unwieldy. The Emperor Diocletian came up with a solution to this problem in 285 CE, when he divided the Roman Empire into an eastern empire and a western empire. The Western Roman Empire would continue for another couple of centuries, whilst the Eastern Roman Empire would persist for more than a thousand years.

Theodosius I is most notable for making Christianity the official state religion of the Roman Empire. Theodosius was the last emperor to rule both the western and eastern divisions of the Roman Empire.

The Western Roman empire did not experience devastating climate change. The other answers did contribute to the fall of Rome, indicating the complexity of its decline. It is important to remember that this decline was an extremely slow and drawn out process. Just as there is truth to the saying "Rome was not built in a day", so too did it not fall in a day.

The Battle of the Catalaunian Fields was fought in the middle of the fifth century, in the midst of the decline of the Western Roman Empire. It was fought between an alliance of Roman and Visigothic soldiers against the forces of Attila the Hun. The battle ended in a stalemate, but can be best understood as part of the decline of Rome. The Roman army was unable to match the range and tactics of Attila, and massive parts of Roman Europe were pillaged.

The correct answer is relationships with neighboring countries because the new government tried to model themselves after Constantinople. If you chose separating from the church, remember that Constantine brought Catholicism into Rome. They were not trying to separate until later in the Roman Empire. If you chose colonizing Asia or Africa, remember that these conquests did not begin until way later as well. Keep time frame in mind while making your choices.