问题详情

How is finding a birth mother like getting a key to a diary？
A．A diary comes with each birth certificate.
B．The adoptees will have a chance to find out about their mother"s life.
C．If the key opens the diary, you get a birth certificate.
D．The adoptee will have to keep a diary before they get a birth certificate.请帮忙给出正确答案和分析，谢谢！