Answer: C. <span>Mike wanted to go to the pool, but Jess wanted to go to the mall.
Explanation: A complex sentence is composed of and independent clause and a dependent clause. They are usually adjoined by conjunctions such as, but, and, or, etc. We can see in Choice C that there is a contrast with the word "but" between Jess and Mike. Because of this we can assume that this is the correct answer. </span>
