Categorical imperatives are

Question

a. a priori moral laws of how a rational being should use that rationality in practices.

b. derived from observation of human behavior and speculation on what standards would maximize happiness or well being.

c. rules of skill and how to apply a skill to arrive at a particular desired outcome

d. impersonal laws of the material universe and how objects effect each other in the material universe.

e. contingent on outcomes and consequences which actions produce.

Answer 1

The answer is A.

Categorical imperatives are moral laws that tell any rational being as such what they must do or not do, and they are "a priori" because we can figure them out only via the operation of reason independently of our sensory experiences. By telling any rational being as such what they must do or not do, they are telling rational beings how they should use their rationality to do things (don't use it to do some things, but do use it to do others).