What is the definition of common speed?

Answer: D — The average speed or speed you should go on a common road

Common speed is defined as the average speed or the speed you should go on a common road. This term refers to the typical or expected speed at which vehicles travel on a particular road under normal conditions. Choosing the correct answer, option D, aligns with the definition of common speed. Option A, not being able to see a certain color, option B, when you are at fault in a crash, and option C, the ability to see things clearly near and far away, do not accurately define common speed.