Answer:
4 C
Step-by-step explanation:
The strength of an electric field can be defined as:
where f=force and q=charge, and e=strength
Since we're given the strength and the force we can simply rearrange the equation so that we solve for Q:
Original Equation:

Multiply both sides by q

Divide both sides by E

So now plug the known values into the equation

Simplify:
