AP English Language

The correct answer is: B.Complex

Explanation:

A complex sentence contains one independent clause and at least one dependent (subordinate) clause. In the sentence "Although it was raining, we decided to go hiking," the independent clause is "we decided to go hiking," and the dependent clause is "Although it was raining."

The other types of sentences are:

A.Compound: Contains two or more independent clauses joined by a conjuncti...