Question

Answer check:

Read the following poem, then answer the question that follows:

Reginald wanted perfect grades,
and it almost worked out that way.
Math class was his Achilles' heel,
and he could never earn an A.

This poem makes a mythological allusion to the Greek Hero, Achilles. An Achilles' heel refers to

a difficult subject

a favorite thing

a single weakness

a surprising event

I think maybe C, a single weakness.