Answer:
D. By reading the hot temperature gauges on the washing machine and the water heater
Explanation:
If they are using a machine for washing the utensils then there is no place to insert a thermometer into running tap water. Everything is done in the machine.
There is no need to run a separate instrument through the machine since the machine itself has instruments to measure the temperature of the water.
Using a surface probe would not be accurate enough since the utensils would considerably cool off by the time they exit
There are systems in your body that do interesting things but the skeletal system and the muscular system help move your body
