[mturmon]

I chose (a) also, not because of the restatement, but because it proceeded in such an orderly way, without doubling back. E.g., halfway through (c), there's a sentence starting "We would like to find...", which interrupts the deductive steps to insert an end-goal. It seems unnatural.

Even though I chose (a), and like my argument, I find some of the arguments here for (c) convincing as well.

I could not proceed farther than question 1, because I'm kind of tired of real analysis at this point. Certainly not on Sunday morning. ;-)