阅读下列短文，从每题所给的四个选项(A,B,C和D)中，选出最佳选项。
Hello. I’m Jan from Mrs.Lake’s class. My class wants to work together to help the public. We think we have found a great way to do this. Last month we did a class project on the highways near our town. We learned about the Adopt-a-Highway Program. This program brings people together to pick up litter along the roads. We think it would be a great idea for all students in our school to join the program and adopt a highway.
Adopting a highway is not like adopting a pet. When a highway is adopted，only part of the highway is cared for by a group of people. The group agrees to work every week to keep its part of the highway clean.Each group gets its own sign that has the name of the group printed on it. The sign is put up at the side of the road. This sign lets drivers know who is keeping that area of the road clean.
