If you need relationship and you cannot talk to your parent or guardian, who would you seek from?
a. an impartial stranger
b. a blog
c. a family friend
d. a trusted teacher

A won't work because asking help from a stranger that you hardly know isn't the best choice. 
B won't work because once again, asking for help from strangers on a blog isn't the best choice either.
C may work because since this person is a family friend, that means that this is a person who has known and spent time with your family.
D may work because if you trust a teacher well enough, you can ask the teacher for advice on your relationship.

Although.. I suppose it really depends for everybody. I have an Art and English teacher that I can trust well. 

I think the best answer to go with is C, a family friend.