Which of the following italicized parts is used as an object？A．John wondered why he was wa

Which of the following italicized parts is used as an object？

A．John wondered why he was wanted by the police.

B．They tell me when they went to school.

C．He will write a book on how Chinese people learn English.

D．I am not interested in what you are doing.

请帮忙给出正确答案和分析，谢谢！