4. According to sociology, there are: a. Primarily biological grounds for sex differences explaining gender expressions.
b. Cultural practices that simply extend biological sex differences.
c. Both a &b.
d. Cultural expressions of gender that may or may not work with sex differences because nature may not
ground all that we see in the lives of males and females.

D.  Cultural expressions of gender that may or may not work with sex differences because nature may not  ground all that we see in the lives of males and females.

Explanation:

Sociology re-examine why the roles of gender in modern society  is the way it is (For example, males are generally seen as a strong provider while females are generally seen as a weak nurturer).

If we see this through a biological point of view, we can make an argument that since males are genetically born stronger, males are more equipped for provider-related activities (such as hunting down animals and giving protection to the group).

But, almost all jobs that exist in modern day require less of this physical strength. But the roles between the same generally still viewed as the same.

This is why sociology tried to find out whether there is a cultural influence that affected the expressions of Gender. For example, they studied the psychological affect of parenting method that teach their daughter from early age that they should be gentle and feminine compared to the parenting method that teach their daughter from early age that they could be a strong provider.

answer; code of federal regulations;

answer; jung;