The main reason why you would use the revising strategy called Use Snapshots is because snapshots are some of the easiest way to catch and contain lots of material, especially on a computer desktop.
I am not sure about the first question, I cannot help you with that one, sorry. :/
However, the second question I know. Ragnarok is A), an apocalyptic prophecy, a Norse prophecy stating when the end of the world will come.
From reading the conclusion of the great gatsby, it seems that daisy would have mixed emotions. Firstly initially she would be happy that she can start her life again but in contradiction that her life she wanted to have was full of lies, sorrows and heartbreak.