Answer: Figurative Language
Explanation:
The two opposing forces in WW1 were a) Allies and Central Powers.
The First World War started as a two-sided war between Austria-Hungary and Serbia in 1914. It evolved into a war in which thirty two countries took part. Britain, Russia, France, the United States and Italy formed The Allies. These countries battled against Austria-Hungary, Bulgaria, Ottoman Empire and Germany, known as the Central Powers.
It wouldn't matter really, but A is good. If you don't have a dictionary at hand, then do your best to pronounce it.
The answer is B. Because, if the students had the flu, of course their absence was 'legitimate', which means 'acceptable', allowed. And 'aberration' means 'something unusual or unexpected", because they usually have perfect attendance, but now they missed a couple of classes.
Can you take a better picture ?