What Would Be the Effect of Adding Carbon Dioxide On [

What would be the effect of adding carbon dioxide on $[ \mathrm { CO } ]$ in the reaction, $\mathrm { CuO } ( \mathrm { s } ) + \mathrm { CO } ( \mathrm { g } ) f \mathrm { Cu } ( \mathrm { s } ) + \mathrm { CO } _ { 2 } ( \mathrm {~g} )$ ?

A) $[ \mathrm { CO } ]$ remains constant
B) $[ \mathrm { CO } ]$ increases
C) $[ \mathrm { CO } ]$ becomes zero
D) $[ \mathrm { CO } ]$ becomes insignificant
E) $[ \mathrm { CO } ]$ decreases