If the pressure on the reaction Nā‚‚9g)+Oā‚‚(g)ā‡Œ2NO(g) at equilibrium is increased,
a. The quantity of Nā‚‚(g) decreases.
b. The quantity of NO(g) increases.
c. The quantity of NO(g) decreases.
d. The quantities in the system do not change.