PLEASE HELp!!

For which values of A, B, and C
will Ax + By = C be a vertical li
through the point (9, 3)?
A A= 1, B= 0, C = 3
B A = 0, B = 1, C= 3
C A = 1, B = 0, C = 9
© A= 0, B = 1, C= 9