The following that is a modifier is C, an adjective and an adverb.
D. replace a semicolon
hope this helps :)
"exuberance" means enthusiasm or showing a lot of energy. if someone holds back a cry of pain, that doesn't really make them seem energetic or excited. from that alone, you can infer that "stoicism" is your answer, but that word relates to a pointed lack of emotion, like when someone doesn't want to lose face or show that they're in pain.
They are all correct but A. Explains it the best