The correct option is C Subject: All roads; Predicate: lead to Rome
The subject is who or what the sentence is about, and the predicate tells something about the subject. Here the sentence is about all roads and the sentence says that they lead to Rome. Therefore, Option B is correct. In rest of the options, either the information is taken as the subject(Option A,D) or a part of the information is included along with the object of focus,(Option C).