Mr. Price just announced its upcoming special promotions such as "buy one item and get the second one free" and "10% discount on selected items", but these specials are only exclusive to account holders. This advantage of granting credit is known as: (2)

A.
Aiding advertisements and communication

B.
Increasing sales

C.
Account holders' privilege

D.
Retention of customer base

E.
Cross-selling to existing customers