which sentence is a correctly formed complex sentence? a leonard mead walked alone, and the streets were…

which sentence is a correctly formed complex sentence? a leonard mead walked alone, and the streets were empty. b because the streets were empty leonard mead walked alone. c leonard mead walked alone because the streets were empty. d leonard mead walked alone; because the streets were empty.
Answer
Brief Explanations:
A complex - sentence has one independent clause and at least one dependent clause. Option A has an independent clause "Leonard Mead walked alone" and a dependent clause "and the streets were empty". Option B is a simple sentence with a single independent clause. Option C has a dependent clause "because the streets were empty" followed by an independent clause "Leonard Mead walked alone", but the comma placement is incorrect for a complex - sentence structure. Option D has an incorrect semicolon usage for a complex - sentence structure.
Answer:
A. Leonard Mead walked alone, and the streets were empty.