Which sentence is an example of proper semicolon use?
A. I called Janice; isn't the weather terrific?
B. Some reptiles like a dry climate, while others; prefer a wet climate
C. Scientists have studied many of the lands on Earth; and are now exploring the ocean floors
D. The gym is on the ground floor; the classrooms are above it.
A semicolon is used to separate two complete sentences that are related in some way. Answer choices A and D both use a semicolon to separate two complete sentences, however, answer choice A combined two unrelated sentences. D is correct.