Cannot is formal, while can't in informal.
"Cannot" and "can not" are interchangeable, but when you are asking question for example:
"why can't I...", you can also say "why can I not..." (which is more formal), but you can't say "why cannot I..."
I am thinking A
because since they are undefeated the there is a chance they wont win or thins could be like those cheesy type of stories and they will win
My best guess would be allusion
An independent clause can make sense on its own be a fragment serve as a comma splice be a run-on sentence
True