Similarity on Social Characteristics Is Referred to as Homophily

Similarity on social characteristics is referred to as homophily.That is, we like individuals who are similar to us because:

A) the old adage, "birds of a feather flock together", is actually an accurate saying.
B) we are least likely to get positive reinforcement from those similar to ourselves.
C) most of us do not have the social skills required to mingle with those who are different.
D) it is more socially acceptable to restrict our social interactions with those who are similar to us.