If the Rate of Reaction of [0

If the rate of reaction of [0.1 M] sodium cyanide with [0.1 M] 2-bromo-2-methylpropane is 1.2 x 10^-3 M/s,what would be the effect on the overall rate if the concentration of sodium cyanide is increased to [0.2 M] and the concentration of the alkyl bromide is decreased to [0.05 M]?

A) the rate will increase by a factor of 2
B) the rate will decrease by a factor of 2
C) the rate will increase by a factor of 10
D) the rate will decrease by a factor of 10
E) the rate will remain unchanged