(D) Cement is a vital material for national infrastructure,second only to iron and steel. It is primarily used in the following ways: $1$. In the prep

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(D) Cement is a vital material for national infrastructure,second only to iron and steel. It is primarily used in the following ways: $1$. In the preparation of concrete and reinforced concrete. $2$. In plastering walls and surfaces. $3$. In the construction of major infrastructure such as bridges,dams,and buildings.