The correct options are
B Rate constant increases with increase in temperature. This is due to a greater number of collisions whose energy exceeds the activation energy.
C Higher the magnitude of activation energy, stronger is the temperature dependence of the rate constant.
D The pre-exponential factor is a measure of the rate at which collisions occur, irrespective of their energy.
(b, c, d)
a. A high activation energy usually implies a slow reaction.
c. k=P×Z×e−Ea/RT
d. The pre-exponential factor (A = P×Z) is independent of the activation energy and the energy of molecules.