The rate law for the reaction $\mathrm{A}+\mathrm{B}+\mathrm{C} \longrightarrow$ Product is expressed as Rate $=\mathrm{K}[\mathrm{A}]^{2}[\mathrm{~B}]^{1}[\mathrm{C}]^{0} .$ What is the overall order of the reaction?