Which of the following sentences does NOT have an attributive clause？A．Please pass me the

Which of the following sentences does NOT have an attributive clause？

A．Please pass me the book whose color is red.

B．Linda, as you know, is a famous writer.

C．John was ill, which greatly upset me.

D．It is a question when he will come back.

请帮忙给出正确答案和分析，谢谢！