Ladies and Gents:
Last night at the SLOA rules test meeting we discussed an answer about when the ball becomes dead. The answer that was marked was "when the official's whistle is blown"---we discussed this a little and determined this to be the logical answer.
However--upon completing and submitting the test this morning I was informed that the answer was incorrect. The answer should combine the choices of the referee blowing the whistle and a violation on a free throw by the throwing team. So it should be the choice that gives you A and B only or however you test may be worded.