Answer:
D
Step-by-step explanation:
If a reaction is zero order with respect to reactant A, it means that the rate of the reaction does not depend on the concentration of A. Therefore, when the concentration of A is halved, the rate of the reaction will remain the same.
This is because the rate of a zero-order reaction is independent of the concentration of the reactant. It means that the rate constant of the reaction is constant and the reaction rate is only dependent on the presence of the reactant A.