Computer RAM has essentially the same characteristics. Your computer often does not have enough memory to run certain programs, and when you turn it off, bye-bye data! Your long-term memory is something like a computer's hard drive. Both of them take longer to respond, but can store a considerable quantity of data.
I think C. You can't have just proteins or no fats in your diet. It needs to be balanced with a little of everything.
Just walk out and if you end up getting in trouble tell them you really needed to go and couldn't wait anymore.
