Where is the poet? Post the poet then I can answer it.
I believe the answer is evidence
"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.
the answer is b. 15 minutes
you should at least read for half of 30 minutes which is half an hour
hope I helped
:D