关于子宫脱垂的病因，以下说法错误的是()。

A．与长期咳嗽、便秘有关

B．老年妇女盆底组织萎缩可发生子宫脱垂

C．产后过早从事重体力劳动可引起子宫脱垂

D．产妇分娩损伤未能及时修补可致子宫脱垂

E．不可能发生于未产妇

Speaker A: Hello! Professor Freeman’s secretary. Can I help you
Speaker B: ().

A. Hello! Can you find Professor Freeman for me

B. Yes. I hope you can help me. My name is John Smith.

C. Good afternoon I’d like to make an appointment to see the professor on Thursday, please.

D. Thank you. Professor Freeman knows me well.