Answer: A) Your brain helps you to take a test.
Explanation: a compound verb is is a verb that is made up of multiple words. The compound verb can take on such forms as: a prepositional verb (for example: believe in, ask for, etc), a phrasal verb (like: take down, work on, etc), a verb with auxiliaries (like: are walking, will eat, etc), and a compound single-word verb (such as: double-click, color-code, etc). From the given options, the sentence that has a compound verb is option A, because the verb "help to take" is made up of multiple words.