Answer:
The sentence that has a compound subject and a compound predicate is the following one: Tom and Harry cleaned and mopped the floor.
Explanation:
On the one hand, a compound subject is a subject made up of two simple subjects which are joined by a coordinating conjunction (and/or) and have the same predicate. In this case, the predicate is also compound. A compound predicate is two or more verbs or verb phrases that share the same subject and are joined by a conjunction. The compound subject is "Tom and Harry" and the compound predicate is "cleaned and mopped".