Answer the following question given this paragraph: 

Materials that have low resistance to electric current are called electric conductors . Many metals—including copper, aluminum, and steel—are good conductors of electricity. Water that has even a tiny amount of impurities in it is an electric conductor as well.


Q: Water and many metals are materials that have low resistance to electric currents and are therefore known as what?

 Choices:

- radioactive

- good insulators

- electromagnets

- electric conductors

A:
electric conductors
