Which of the Given Relationships Correctly Compares the Rates of the Reactants

Multiple Choice

Which of the given relationships correctly compares the rates of the reactants and products for the reaction below?
2 NOCl(g) ? 2 NO(g) + Cl₂(g)

A) $- \frac { \Delta [ \mathrm { NOCl } ] } { \Delta t } = \frac { \Delta [ \mathrm { NO } ] } { \Delta t } + \frac { \Delta \left[ \mathrm { Cl } _ { 2 } \right] } { \Delta t }$
B) $\frac { \Delta [ \mathrm { NOCl } ] } { \Delta t } = \frac { \Delta [ \mathrm { NO } ] } { \Delta t } = \frac { \Delta \left[ \mathrm { Cl } _ { 2 } \right] } { \Delta t }$
C) $- \frac { 1 } { 2 } \frac { \Delta [ \mathrm { NOCl } ] } { \Delta t } = \frac { 1 } { 2 } \frac { \Delta [ \mathrm { NO } ] } { \Delta t } = \frac { \Delta \left[ \mathrm { Cl } _ { 2 } \right] } { \Delta t }$
D) $\frac { - 2 \Delta [ \mathrm { NOCl } ] } { \Delta t } = \frac { 2 \Delta [ \mathrm { NO } ] } { \Delta t } = \frac { \Delta \left[ \mathrm { Cl } _ { 2 } \right] } { \Delta t }$
E) $\frac { \Delta [ \mathrm { NOCl } ] } { \Delta t } = \frac { \Delta t } { \Delta [ \mathrm { NO } ] } = \frac { \Delta t } { \Delta \left[ \mathrm { Cl } _ { 2 } \right] }$