Which of the following italicized phrases indicates PURPOSE？A．We worked round the clock to

Which of the following italicized phrases indicates PURPOSE？

A．We worked round the clock to finish the job.

B．He is a witty man, and an inspiration to all of us.

C．It is important to cancel the order immediately.

D．Romeo left the stage, to enthusiastic applause.

请帮忙给出正确答案和分析，谢谢！