if the electric flux $D=2x^2{a}_x-y{a}_y+xyz{a}_z(\frac{C}{m^2}),$ then the charge density at $p(1,1,1)$ is

Select one:

a$.$

${}_v=6\frac{C}{m^3}$

b$.$

${}_v=4\frac{C}{m^3}$

c$.$

${}_v=-4\frac{C}{m^3}$

d$.$

${}_v=-6\frac{C}{m^3}$