Both C and B can be reasonable reasons why a *Relationship* isnt forming.
[BOTH BOYS ARE TOO BUSY]
When a person is too busy, the person may not try to get friends. They wouldn't be able to hang out together, thus making the relationship decrease.
[BOTH BOYS ARE NOT COMMUNICATING]
if you're not communicating to eachother you won't have the *best* relationship. Talking to eachother is the main part of being friends or even dating someone. Not talking to someone will make them feel as if the relationship/friendship isnt worth it and will end it off.
(INCORRECT ANSWERS)
[BOTH BOYS ARE ON A DIFFERENT TEAM]
They may be going against eachother, but that *won't* end a friendship. Sometimes it builds friendships up. Thus this amswer is incorrect.
[THE BOYS ARE NOT BEING GENEROUS WITH THEIR TIME AND EFFORT]
This won't really do *anything* to the relationship. It may, but C and D would have more effects on the friendship. If both boys have this, then they may even be able to become friends because of the similarity, thus making this answer *Incorrect*
