Answer: b. False
A complex sentence is a type of sentence that is a combination of one independent clause and at least one dependent clause. An independent clause can stand stand alone and expresses a complete thought while a dependent clause cannot stand alone and does not have a complete thought. Here are some examples of complex sentences
Although it is raining very hard, I still went to school.
Despite the current challenges, she managed to succeed.
Technology has become a household name since the first time it was introduced.