Porters who carry heavy luggage always have a long piece of cloth with them. Before carrying the load on their heads they fold the cloth in the shape of a mound disc and place it on their heads. By doing this they

Options

A. Increase the area of contact of the load of luggage with their head
B. Decrease the force exerted by the load of luggage on the head
C. Decrease the thrust of the luggage
D. Save their heads from possible injury

Answer

A