The plural form of roof is roofs.
Although there are many words where f would become v, like in hooves, this is not one of those cases.
Answer:
1787 comment on human infallibility resonates today. ... He said, (paraphrasing), that, “living as long as I have, I've come to the conclusion that we must all, at times, doubt our own infallibility.”
Explanation:
Definition 5 - call into question
In this sentence - it would be pronounced khun-test (ed) and the class VP would question the decision to cancel the pep rally.
