阅读下面材料，从每题所给的A、B、C、D四个选项中选出最佳选项。

    As a student, how often do you exercise, play basketball, watch TV and do homework? We did a survey in No.39 Middle School. The following from shows the results.

Activities	Every day	Three or four times a week	Twice a week	Once a week
Exercise	55%	30%	12%	3%
Play basketball	20%	40%	20%	20%
Watch TV	5%	60%	30%	5%
Do homework	90%	8%	2%	0%