Which of the Following Are Acceptable in Relationships Between Purchasers

Multiple Choice

Which of the following are acceptable in relationships between purchasers and suppliers? 

A)  Giving the 'right of first refusal' to your current supplier. 
B)  Accepting invitations to a free dinner event. 
C)  Engaging in a personal friendship with the person who is responsible for ordering or invoicing. 
D)  Accepting invitations to purchase tickets to a charity dinner.