People in the countryside are friendly

Mark the letter A, B, C, or D to indicate the sentence that best combines each pair of sentences in the following questions.

Your parents will help you with the problem. You should tell them the story.

A. Because your parents will help you with the problem, you should tell them the story.

B. Your parents will help you with the problem since you should tell them the story.

C. If your parents will help you with the problem, you should tell them the story.

D. Your parents will help you with the problem because you should tell them the story.