Question

Which is a complex sentence?

A) They will not defeat their enemy until they come up with a better strategy.
B) The castle is a fortress, but it does have some weaknesses.
C) With its calm surface, the moat looked harmless, but it had hidden dangers.
D) Watchful archers hid in the towers, and the soldiers stood ready below.

Answer 1

The complex sentence is A) They will not defeat their enemy until they come up with a better strategy.

Explanation:

A complex sentence has one independent clause and at least one dependent clause.

They will not defeat their enemy until = dependant

they come up with a better strategy. = independent