The better wording would be D) not enough information to give a definitive answer. It's like the old gotchya question; what is 1+1 ? of course the answer is it depends on if you are using binary or a base of integer >2.
But that reminds me of the joke: there are 10 kinds of people: those who know binary, those who don't, and those who didn't know the '10' was written in base 3.
