![](https://cos-cdn.shuashuati.com/pipixue-web/2020-1231-2005-12/ti_inject-812ce.png)
What’s the function of mucus?
A.
To block the entrance of the sperm to the woman’s womb for all time.
B.
Transformed by hormones to from a barrier into a chemical rope ladder for sperm to enter the cervix.
C.
To attack the sperm from all directions.
D.
To enable the sperm to burrow into the corona radiata.