When the sentence "They had made a mess of the house." is turned into passive voice, which

When the sentence "They had made a mess of the house." is turned into passive voice, which of the following is CORRECT？(2014-63)

A．A mess had been made in the house.

B．A mess had been made by them.

C．The house had been made a mess of.

D．The house had been made a mess..

请帮忙给出正确答案和分析，谢谢！