To avoid excessive and unnecessary noise while driving, you must...
A)ensure that the exhaust pipe and silencer of the vehicle are always in good condition.Correct
B)use the horn frequently but without producing strident noises or musical notes.
C)drive with the exhaust pipe open.
Noise pollution is becoming a major problem in cities. That is why in built-up areas the horn must not be used and the exhaust pipe and silencer must be in perfect condition so as to emit the least amount of noise. Driving with a so-called "open exhaust" is completely prohibited as it generates a great deal of noise pollution.