ABC Credit Union Began Offering a "Sweep Account," in Which

ABC Credit Union began offering a "Sweep Account," in which funds over $500 in a checking account would be "swept" into a money-market, interest-bearing, account until the checking account reached $100, at which point, funds from the money market account would be "swept" back into the checking account. This is an example of a ____ change.

A) product or service
B) technological
C) strategy and structure
D) people