What is the essential difference between an `Ethical Hacker’ and a `Cracker’?

A.
The ethical hacker does not use the same techniques or skills as a cracker.

B.
The ethical hacker does it strictly for financial motives unlike a cracker.

C.
The ethical hacker has authorization from the owner of the target.

D.
The ethical hacker is just a cracker who is getting paid.

Explanation:
The ethical hacker uses the same techniques and skills as a cracker and the motive is to find the security breaches before a cracker does. There is nothing that says that a cracker does not get paid for the work he does, a ethical hacker has the owners authorization and will get paid even if he does not succeed to penetrate the target.