Which one of the following statements is an example of a complex sentence?

AThe earth was spinning when Lucas first saw Lucille.
BNeap tide is the best time for digging clams.
CSparrows at the bird feeder compete for seeds.
DThe crescent moon is a symbol of Islam.

Verified Answer :

The statement that is an example of a complex sentence is A. The earth was spinning when Lucas first saw Lucille. Complex sentences contain an independent clause and at least one dependent, or subordinate clause that cannot exist on its own without its independent counterpart. Here, when Lucas first saw Lucille is subordinate because it demands its independent part in order to be complete. The remaining options are all simple sentences, consisting of a single independent clause.