In which of these sentences is the list correctly punctuated ?

Comparing and contrasting is a form of

Modernist poets were concerned with many issues and used their poetry to express their concerns. which item from this list was not one of their concerns? a. corruption of traditional american values b. brutality of wwi c. the effects of the great depression d. crowded, crime-ridden city life e. alienation of the individual

What is the reasoning in this argument?