You Are at a Party with a Very Close Group

Multiple Choice

You are at a party with a very close group of friends one evening,and you spy an acquaintance (a former classmate from a sociology class) at the same party.If the acquaintance becomes friends with your group of friends,the tie between you and your former classmate is stronger because:

A) you are now much more intimate with your former classmate.
B) it is now reinforced by the ties between your close group of friends.
C) ties to your close group of friends have changed.
D) the party has functioned as a reference group