K C = 0.35 for the Reaction

K c = 0.35 for the reaction:
H₂ (g) + I₂ (g) 2 HI (g)
If one mole of H₂ and one mole of I₂ are placed in a 1.0 liter container, the equilibrium concentration of HI is:

A) 0.46 M
B) 0.77 M
C) 0.23 M
D) 0.63 M
E) 0.30 M