A particle of mass m is moving in a circular path of constant radius r such that its centripetal acceleration ac is varying with time t as `a_c = k^2rt^2`, where k is a constant. Calculate the power delivered to the particle by the force acting on it.
A. `2pimK^(2)r^(2)t`
B. `mk^(2)r^(2)t`
C. `(mK^(4)r^(2)t^(5))//3`
D. `0`
