Its actually A. I did the same question and A was the correct answer.
The electric filed in V/m is 1.58 * 10^6 V/m
<h3>What is the electric field?</h3>
We know that the electric field is obtained as the ratio of the voltage to the distance that separates the plates.
Thus;
E = V/d
E = electric field
V = voltage
d = distance of separation
E = 24 * 10^3 V/1.52 * 10^-2 m
E = 1.58 * 10^6 V/m
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To solve the problem, we can use the equivalent of Newton's second law for rotational motions:

where

is the net torque acting on the object
I is the moment of inertia of the body

is the angular acceleration of the object.
Using the data of the problem:

and

, we find the net torque acting on the object: