My analysis
Here are the results for my quiz yesterday:
1) As far as I’m concerned, d is the only correct answer. Bringing food or drinks of any kind into a restroom of any kind is absolutely gross. Think aerosol! However, I know people who use a-c as options because I’ve seen them spill or I’ve seen the drinks on the floor of the stall. 
2) d. Although I can multitask with the best of them, there are several things I do that I like to do without interruption, and I am pretty sure these acts are the ones that involve not being fully dressed. So if I can reach my phone at all, I’d shut it off, not just for me, but let’s face it… when a phone rings, everyone gets the urge to answer it. It’s just common courtesy to NOT have it ring. And umm, answering the phone while you and/or others are disposing waste of their bodies? COME ON!!! Who wants to hear that or a hearty flush?
3) c. If you hang out with me, you will know not to speak to me while either one of us is in a stall. See my explanation in 2) about not wanting to be disturbed.
4) d. Unless you have kids or a relative in the hospital, I think the world can spare 2 hours without you. Turn off your phone during a movie. If you forget and it rings, turn it off then. If you DO have kids or a relative in the hospital, b. is your next best option. Whatever the case may be, STOP THE RINGING! and the goal is to be inconspicuous, as in SHHHH!
5) a. And if that doesn’t work, then d. But this is just me. I find that most people are polite enough to stop since they probably didn’t realize they were doing it in the first place. If they don’t stop, don’t sit there getting pissed, or start an argument. Just move. Don’t be an ass about things.
6) d. In this case, I would imagine the person doesn’t realize how loud they are. Some people are just oblivious like that, and again, don’t be an ass… just move.
The end!