Most Businesses That Make Campaign Contributions,gratuities,and Entertainment of Some Sort

Most businesses that make campaign contributions,gratuities,and entertainment of some sort to an entity hoping for some type of favors,but it only becomes bribery when

A) both parties are caught.
B) the recipient engages in an unethical political practice on behalf of the giver.
C) when the payer and the recipient agree to a set schedule for "gifts."
D) when there is an agreement between the payer and the recipient that the briber expects "something for something".