The correct answer is: A. True.
Resistance is measured in ohms. Ohm is the unit of electrical resistance in the International System of Units (SI). It is named after Georg Ohm, a German physicist who discovered the law of resistance in 1826.
The other options are incorrect. Option B is false because resistance is measured in ohms, not in volts. Option C is incorrect because turning the printer on and off will not fix a problem with the printer’s resistance. Option D is incorrect because replacing the ribbon will not fix a problem with the printer’s resistance. Option E is incorrect because it is not one of the possible answers.