Choose the correct term for the definition - property that leads to electromagnetic interactions.

A. Semiconductor B. Electric charge C. Electrical conductor. D. Electrical insulator

I think the answer is D

B) erini just took the test and it is correct

The answer is 4f======since electrostatic force is given by    we let f be the electrostatic force when  r = 1 m    if we let  denote the electrostatic force when the distance is decreased so that r = 0.5m, then    we established earlier that f = kq₁q₂. therefore    the force will now be 4f.