When opening her print store, Ser$$na processed several large print jobs for local merchants for free, to demonstrate the quality of her service and to solicit feedback. Two of the merchants wrote favorable reviews, and agreed to let Serena post the reviews on her company's website. The companies that wrote the favorable reviews are referred to as

A$)$ tribute reports

B$)$ market segments

C$)$ appreciation accounts

D$)$ price$-$quality attributions

E$)$ acknowledgement accounts