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A given reaction between gases A and B to produce C and D is a two-step endothermic process at STP. The activation energy of the first step is one-third the value of the activation energy of the second step.

When the reaction is carried out at 215 Kelvin, which of the following changes to the system can be attributed to an increase the overall rate of the reaction?


Proportionally increasing the pressure and volume of the system.


Decreasing the temperature of the system.


Adding a catalyst to the reaction mechanism of the first step.


Increasing the amount of either A or B in the reaction chamber.

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