The Gas Phase Reaction X + Z Q Is Found

The gas phase reaction X + Z Q is found to have the rate law Rate = . What will be the effect of doubling the initial pressure of both X and Z on the initial rate?

A) No effect.
B) Rate goes up by a factor oF₄.
C) Rate goes up by a factor of 2.
D) Rate goes up by a factor of 8.
E) Rate goes up by a factor of 16.