Imagine a shopkeeper who is honest because being honest is good for business. when the shopkeeper refrains from cheating a customer, kant would say this action
a. was wrong because its motive was impure.
b. was in accordance with duty, but not done from duty.
c. displayed a high level of moral worth.
d. shows that he was following the categorical imperative.

d. shows that he was following the categorical imperative.

Explanation:

 Kant advocated that people should do their duty from a sense of duty or what is morally correct . But sometimes it is difficult to judge what is morally correct . In case of uncertainty , we should be guided by the principle

of " categorical imperative". Its meaning basically is that , we should judge by thinking , what if everybody acts the way , I am thinking to do. If I think , taking bribe is right , what if everybody takes bribe . The outcome will be disastrous . So bribe taking can not be morally correct. This is how

" categorical imperative" works

the answer is true .