A Reaction X + 2Y $\rightarrow$ 3Z Is Started with 1

A reaction X + 2Y $\rightarrow$ 3Z is started with 1.0 M Z and no X or Y. To calculate the equilibrium concentrations of all species using an ICE table, which of the following would you enter in the Z column for the C row?

A) 1.0 M
B) 1.0 M - x
C) 1.0 M - 3x
D) 1.0 M + 3x
E) -3x