somewhat off topic:
about the thing with the "one"
did you know that in multiple choice exams stastically "c" (assuming only 4 choices a,b,c,d,) is most commonly correct.
Also less often than the "c" thing but still occours, stastically the longest answer is the correct one (this one doesn't apply to maths tests).
So basically if you don't know the answer go with probability
