A motor vehicle operated on a highway must have which of the following equipment?

Answer: D — All of the above

For a motor vehicle operated on a highway, having all necessary equipment is crucial for safety and compliance with regulations. Windshield wipers in good working order are essential for maintaining visibility during inclement weather. They ensure that the driver can see clearly, which is vital for safe driving. Mudguards or fenders play an important role as well; they help minimize the amount of water, mud, and debris that can be sprayed onto other vehicles and road users from the wheels. This is particularly important for maintaining safety and preventing accidents on wet or muddy roads. A rear-view mirror is another critical piece of equipment. It allows drivers to see behind them without turning around, which is necessary for safe lane changes, merging, and backing up. Having all of these items—windshield wipers, mudguards or fenders, and a rear-view mirror—ensures that a vehicle is equipped to handle various driving conditions safely and legally. This collective requirement is reflected in the correct answer.