Graph the relation shown in the table. Is the relation a function? Why or why not?
x | y
-1 | 3
-1 | 2
0 | -4
4 | 2

A. Yes; no horizontal line passes through two graph points.
B. Yes; no vertical line passes through two graph points.
C. No; a vertical line passes through two graph points.
D. No; a horizontal line passes through two graph points.