Which one of the following statements is an example of a complex sentence?
a. the earth was spinning when lucas first saw lucille.
b. neap tide is the best time for digging clams.
c. sparrows at the bird feeder compete for seeds.
d. the crescent moon is a symbol of islam.

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.

It has to be probably c

To get what you want you have to work for it.