Which of the following sentences is INCORRECT？A．He earns twice as much as he used to.B．The

Which of the following sentences is INCORRECT？

A．He earns twice as much as he used to.

B．The width of this new road is two times that of the old one.

C．This book is four times more expensive than that one.

D．The new square is four times size that of the previous one.

请帮忙给出正确答案和分析，谢谢！