I was playing at a local card room and the following situation happenned:Player A was making huge bets trying to push Player B off of his hand. It didn't work, Player B called all the way down to the River and showed a straight for the winner. Player B then asked to see Player A's hand, Player A seemed to think that was in poor taste to ask, stood up, reached over and mixed his cards in to the muck so the could not be found or seen.1) what is the rule? should Player A have been required to show since he was called?2) was it in poor taste for Player A to ask?3) was it in poor taste for Player