I don't think it's a good idea to revise it for years - the topic might get irrelevant in the meantime!
Also getting it "right" the first time - or even the second time is not very likely, a more likely option is that it will need between 3 and 10 revisions. So I think the best option is <span>B. Work on it over a seven-day period and rewrite it at least twice.</span>
First appendectomy because that’s the surgery they wanted to do and they decided to do
Intrinsic motivation is a motivation "from inside", with internal, rather than external awards.
Three of the things you mentioned have an external reward: the 500 Dollar prize( first option), the credit (third) and the hope of winning a blue ribbon (the last).
Only the second one has an intrinsic motivation: that you will be happy about performing this song (feeling proud of yourself, etc).
