In Vander Waals equation of state of the gas law, the constant 'b' is a measure of

Question

$\begin{array}{1 1}(A)\;\text{intermolecular repulsions} \\(B)\;\text{intermolecular collisions per unit volume} \\(C)\;\text{Volume occupied by the molecules}\\ (D)\; \text {intermolecular attraction } \end{array}$