Use the Rational Zero Theorem to list all possible rational zeros for the given function f(x) = 9x4-x3+4x2-3x-21 . . .x. Which of the following is the complete list of possible zeros of the given function? O A. +1, 13,47, + O B. 1 +1,+3, + 7.+ gig OC. 7 +1, 13, 17, +21,4 O D. The function has no rational zeros