To avoid excessive and unnecessary noise when driving, you should...
A)Drive with a free exhaust pipe.
B)Use the horn frequently but without producing strident sounds or musical notes.
C)Make sure the vehicle's exhaust pipe and silencer are always in good condition.Correct
The exhaust system, and in particular the silencer, is responsible for reducing the noise produced by the engine. Driving with this device in poor condition or modified ("free exhaust") generates excessive noise pollution. Therefore, it is mandatory to keep it in perfect condition to comply with regulations and avoid penalties.