suppose that we are using infinite bit vectors to represent subsets of the natural numbers, using the same notational conventions as in the textbook. then a finite subset of the natural numbers would be represented by (a) a bit vector of infinite length which contains only finitely many ones. (b) a bit vector of infinite length which contains only finitely many zeros. (c) a bit vector of finite length (d) an itty bitty vector of infinitesimal length