Questions: After President Jefferson opened the White House for public tours, it remained open to the public

The answer is (A) S

This option suggests that the sentence is a simple sentence, which means it contains one independent clause. The sentence "After President Jefferson opened the White House for public tours, it remained open to the public" is indeed a simple sentence because it has one main clause: "it remained open to the public," and a dependent clause: "After President Jefferson opened the White House for public tours."

This option suggests that the sentence is a fragment. A fragment is an incomplete sentence that lacks a main clause. However, the given sentence is complete and contains both a subject and a predicate, making it a complete sentence rather than a fragment.

This option suggests that the sentence is a run-on sentence. A run-on sentence occurs when two or more independent clauses are joined without proper punctuation or conjunction. The given sentence does not fit this description as it is properly structured with a dependent clause followed by an independent clause.

This option suggests that the sentence is a comma splice. A comma splice occurs when two independent clauses are joined by a comma without a coordinating conjunction. The sentence in question does not have two independent clauses joined by a comma, so it is not a comma splice.