What's the difference between a compound sentence and a simple sentence with a compound verb? Well, a compound sentence is two simple sentences combined with "and," "but," "or," or another preposition. For example: I like cats, but my brother likes dogs. "I like cats" can be one sentence, while "My brother likes dogs" could be another. They are connected by "but."
A simple sentence is just one sentence; a compound verb is simply two verbs as the action for one sentence. For example: "I like to read and write." "Read and write" is a compound verb: there are two verbs. However, this is a simple sentence.
Now, which is our sentence? "Emilio and Stuart jog and lift weights at the gym." Are there two simple sentences? No. But do we have a compound verb? Yes: "jog and lift." So, the answer is B: simple sentence with a compound verb.
Answer: B