Which of the following sentences expresses SPECULATION（推测)？A．You may drive the car.B．May

Which of the following sentences expresses SPECULATION(推测)？

A．You may drive the car.

B．May you succeed!

C．He may not have finished the work.

D．You might have told me that before!

请帮忙给出正确答案和分析，谢谢！