I thought the same as NV: release, then contact.
The feet of the defender were right on the lane line. He was in great position to "take the charge". I wonder why this level of contact is not a foul. I don't believe it's "minor" or "minimal" contact. Though in this case, I do think that B may have been leaning back when the contact happened.
If that's the way NCAA-M want it called, then so be it. My personal opinion is to follow the rule more closely than the philosophy. Count the basket, call the charging foul, and award the 1+1 at the other end of the court.
However, I only work HS (and soon college!) here in small town Canada, and not national TV NCAA-M games.
