Which of the following describes a situation that is NOT safe during a refueling process?

Refueling while the generator is running is indeed a situation that is not safe. When the generator is operating, it can produce sparks or heat that may ignite flammable vapors released during the refueling process. This increases the risk of fire or explosion, making it critical to turn off the generator before refueling begins.

In contrast, refueling while the generator is off minimizes the risk of ignition sources, and wearing gloves can offer protection against fuel spills and skin contact with potentially harmful substances. Additionally, refueling at a safe distance from flammable materials is a standard safety practice designed to reduce the chances of fire hazards. Therefore, option C clearly describes an unsafe refueling situation due to the added risk of ignition when the generator is running.