Cincinnati-Memphis State - 3 Reviewed

[Jake80]

I was channel surfing yesterday and happened to catch the end of the Cincinnati-Memphis State game. There was an apparent 3-point shot that was reviewed during the next dead ball. The C on ball side called it a 3 originally. The questions I have are.

1) Who initiates the review process?

2) What criteria is used to decide what the final call is?
Is it like the NFL where the call stands unless there is undisputable evidence or does the original call not matter?

3) Are there normally other camera angles available than what is shown on the television replay?

For what it's worth both of the angles I saw on replay seemed to show some of the floor between the player's shoe and the line but the officials obviously saw something to make them decide it was only a 2.