Technician exam question T7D06

WhyAttempting to measure voltage while a multimeter is set to the resistance setting can damage the multimeter. Setting a multimeter to measure resistance puts its own internal battery across the test leads, so connecting those leads to a live voltage source in that setting can push current back into the meter's ohmmeter circuitry and damage it, answer C. Trying to measure resistance on the voltage setting (A) generally just gives a meaningless reading rather than damage, an unconnected ground probe (B) simply prevents a valid measurement, and multimeters don't need a warm-up period (D).