Let f = {(2,5), (-3,7), (0,6), (-9,0)} and g = {(0,-3), (2,6), (7,-9), (5,0)}

Which is not true?


A. (fog)(2) is not defined

B. (gof)(2) = 0

C. (fog)(5) = 6

D. (gof)(-3) = -9

E. None of them are correct