Answer:
The sentence that correctly combines the two sentences into a sentence with a compound verb is the following one: My friend Cheri won a medal and earned the title "Athlete of the Games".
Step-by-step explanation:
The sentence above contains a compound predicate. A compound predicate is two or more verb or verb phrases that share the same subject and are joined by a conjunction. In the sentence above, the compound predicate is made up by the verbs "won" and "earned", verbs in the past simple tense, which have been joined by the conjunction "and".