Final answer:
C) Degrees. The differences between no entry, hot, warm and cold zones may be measured in degrees at some technical rescue calls.
Step-by-step explanation:
The differences between no entry, hot, warm and cold zones may be measured in degrees at some technical rescue calls.
When referring to temperature, degrees are used to quantify the differences between no entry, hot, warm, and cold zones. For example, the temperature difference between a hot zone and a warm zone could be measured as a difference of 10 degrees Celsius.
Therefore, the correct answer is C) Degrees.