子宫脱垂主要的原因是以下哪项（）

A.圆韧带松弛

B.子宫骶骨韧带松弛

C.骨盆底和子宫韧带松弛

D.骨盆底组织松弛

E.主韧带松弛

______ to the climate here, the old couple would rather live here for the rest of their life _____move to another city.

A．Having accustomed; than

B．Accustomed; than

C．Accustom; rather than

D．Accustoming; rather than