Which of the Following Is an Example of the Compulsion

Multiple Choice

Which of the following is an example of the compulsion of proximity?

A) John and Irma went to high school together and reconnected on Facebook.
B) Maria and Thomas met online and communicated using email,text messages,and the phone regularly,but they did not feel a real connection until they met in person for the first time over coffee.
C) Trevor and Alyssa broke up,and now they dislike having to see each other in their sociology class.
D) Travis and Alma do not know each other,but the bus they are on is very crowded,which forces them to rub shoulders.