Dry ice (solid carbon dioxide) is placed in a sealed container. It sublimes to produce carbon dioxide gas and reaches equilibrium at a given temperature. If the amount of dry ice in the container is doubled, then

CO2(s) ⇌ CO2(g)

a. the partial pressure of CO-(2) would increase.
b. the amount of CO(g) would not change.
c. the amount of CO-(g) would double.
d the amount of CO(g) would increase but not double
e. the equilibrium amount of CO(s) would be less.