If a current of 2 amps is moving through a circuit connected to a 9 V battery, what is the resistance of the circuit? ? 4.5 ohms 18 ohms 0.2 ohms 7 ohms I think that the answer might be D because 9-2

If a current of 2 amps is moving through a circuit connected to a 9 V battery, what is the resistance of the circuit?

?

4.5 ohms

18 ohms

0.2 ohms

7 ohms

I think that the answer might be D because 9-2 is 7? But I really don't know, if someone could explain how they got their answer that'd be great. Thanks millions.