The correct answer is D. Ohms.
Resistance is a measure of how difficult it is for an electric current to flow through a material. It is measured in ohms, which is represented by the Greek letter omega (Ω).
Volts are a measure of electrical potential difference. They are measured in volts, which is represented by the letter V.
Amps are a measure of electrical current. They are measured in amps, which is represented by the letter A.
Watts are a measure of electrical power. They are measured in watts, which is represented by the letter W.
None of the above is a measure of resistance.