The primary aggressor in a domestic relationship is: the first person who strikes the person who exercises power and control over the other. the female victim a and b user: extraneous information is:

relevant information
irrelevant or unnecessary information
information to look for
b and c

Extraneous information is irrelevant or unnecessary information.

 
The primary aggressor in a domestic relationship is: both The first person who strikes  (the other person can be said to want to defend themselves. ) and The person who exercises power and control over the other.  So the answer is A and B.