Final answer:
If CPU usage is 50% or higher, it means the type of work is more demanding than what the CPU can handle.
Step-by-step explanation:
The correct answer is B) 50%. If your CPU usage is 50% or higher, it means that more than half of the CPU's processing power is being used. This indicates that the type of work you are doing is more demanding than what the CPU can comfortably handle. For example, if you are running resource-intensive applications or software that requires a lot of computational power, the CPU usage may be higher.