Which of the following italicized parts modifies an adverb?A.Do it right now.B.That was a

Which of the following italicized parts modifies an adverb？

A．Do it right now.

B．That was a very funny film.

C．I rather like my teacher.

D．We walked about 6 miles.

请帮忙给出正确答案和分析，谢谢！