Question

i felt relieved when:
i had low grades because i hadn’t really tried.
i wasn’t able to keep up with my studies.
my hard work paid off and i was named valedictorian.

Explanation:

To feel relieved, a positive outcome from effort is logical. Having low grades or struggling with studies are negative situations, so they wouldn't cause relief. Being named Valedictorian after hard work is a positive achievement that would bring relief.

Answer:

C. my hard work paid off and I was named Valedictorian.