Answer:
It is both an <u>Action Verb</u> and a <u>Linking Verb</u>
Explanation:
The word became is a true linking verb in that it always links the subject to extra information and it's an action verb because if you are "becoming something" you're committing an action.
A hyperbole is an extreme exaggeration. So it can be concluded that D, is the correct answer.<span />
One tool for narrowing your topic is to list adjectives that apply towards your subject.
(And also, the process of elimination)
~Hope this helped :)