Which of the following set of ordered pairs is a function? A {(9,0), (9, 1), (9,2), (9,3)}
B {(-1,0), (-2, 0), (2,0), (1,0)}

C {(-2,0), (3, 1), (3,2), (1,3)}

D {(9,5), (9, 5), (9,5), (9,5)}