Which is a complex sentence?

1. they will not defeat their enemy until they come up with a better strategy.
2. the castle is a fortress, but it does have some weaknesses.
3. with its calm surface, the moat looked harmless, but it had hidden dangers.
4. watchful archers hid in the towers, and the soldiers stood ready below.

The correct answer is option 1. "They will not defeat their enemy until they come up with a better strategy." is an example of a complex sentence.

Explanation:

A complex sentence is a sentence that combines an independent clause with at least one dependent clause. A dependent clause does not form a complete thought on its own and therefore needs an independent clause for a complete meaning. This is represented in the sentence chosen. The first clause of the sentence is the dependent one, as "they will not defeat their enemy until" is an incomplete thought that needs another clause for completion, therefore the second part of the sentence "they come up with a better strategy".

I believe the answer is A.

Explanation:

the correct answer is c. he speculates on what might happen at given points in the future in a world without people. alan h. weisman is an american author, professor, and journalist. authors organize their information with a purpose. they present their ideas in an organized way. this is called text structure. weisman uses text structure so as to improve overall comprehension and to prove his points.

so is this a rhetorical question?