Their performance varies considerable, they are often idle, and then might have an occasional flurry of activity. For example, if their attendance is sporadic, they may have good attendance for a while, and then disappear unpredictably from time to time.
Who’s max and Kevin? Is this from a book? your question is so vague no one can answer it.
C I’m pretty sure
The statement states how some poems are written inside the shape of the subject of the poem. A would be wrong because there is no key term being defined. B could be correct, but I think the context of the statement and how it would flow in to the paragraph works better with C. D is wrong because it never claims that ALL poems should have interesting shapes.
The answer to your question is C
phrase. If someone sees the light, they finally realize something or change their attitude or way of behaving to a better one.