It could have been work done on the water main outside the hotel in the streets. If air gets in the lines the water will turn brown and the whole property could have air in the lines for a short time. Its could be that the water just had to run for a while to clear the air. So this could have been explained to you by engineering and either made you OK with what happened or not. It depends on the guest.
If you are in a third world country this could be raw sewage backing up into your water and have a horrible smell.
1 C
2 A call you once or twice on your cell if your out having lunch or shopping having a great time. I want to know what I am coming back to.
3 D but only if the problem is just in your room, if its the whole property then A and offer to find you another hotel with out a water problem
4 B but you should move out after first night or if they tell you its just your room be prepared to walk and have another hotel already for you to move after 9 on the first night.