What Combination of X and Y Will Yield the Optimum

Multiple Choice

What combination of x and y will yield the optimum solution for this problem?
Maximize Z = $3x + $15y; Subject to:
(1) 2x + 4y ≤ 12 (2) 5x + 2y ≤ 10

A) x = 2, y = 0
B) x = 0, y = 0
C) x = 0, y = 3
D) x = 1, y = 5
E) None of the choices are correct.