Answer: Quid pro quo
Explanation:
Quid pro quo is defined as a favour granted in return for something done. Betty wants promotion and Ben wants to take advantage of her by granting her a promotion on the basis of Betty fulfilling his sexual flavours. This is an assualt and an unfavourable condition for Betty if she doesn't want to and as such promotion should be merit on stands of hardworking and not an immoral favour.
