Which of the following sentences is INCORRECT？A．There are flowers on both the sides of the

Which of the following sentences is INCORRECT？

A．There are flowers on both the sides of the street.

B．The headteacher says they both can play soccer well.

C．Mrs. Smith can speak both English and Chinese.

D．Tom and Jim are both my good friends.

请帮忙给出正确答案和分析，谢谢！