The rate of reaction depends on the concentration of the reacting species, i.e., reactants in rate equations or rate law, consider the gaseous reactio

The rate of reaction depends on the concentration of the reacting species, i.e., reactants in rate equations or rate law, consider the gaseous reactions:
`aA bB to "Products"`
The rate laws is `r=k[AP][Y]^(y)`
Here (x+y) is the order with respect to that reactant will be taken as zero.
In the reaction `A+B to "Products"`, if the concentration of B is kept fixed and the concentration of A is increased 3 times, the reaction rate increases 27 times. If the concentration of both A and B are doubled, then the increases 8 times. The order w.r.t. A is:
A. 3
B. 2
C. 1
D. zero