According to the passage, which of the following may NOT be the reason for childrens overw

According to the passage, which of the following may NOT be the reason for childrens overweight？

A．Eating fewer fruit and vegetables.

B．Being unaware of self-control.

C．School lunch of low quality.

D．Restaurants" changing menus for children.

请帮忙给出正确答案和分析，谢谢！