According to the text which of the following people riding in the front does not have to

According to the text, which of the following people riding in the front does not have to wear a seat belt？

A．Someone who is backing into a parking space.

B．Someone who is picking up the children from the local school.

C．Someone who is delivering invitation letters.

D．Someone who is under 14.

请帮忙给出正确答案和分析，谢谢！