National Family Opinion $($NFO$)$ contacts several hundred members of its consumer panel and provides them with a printed description of a new chewing gum and its package. Consumers are then given a survey containing several multiple$-$choice questions about their attitudes toward the new product, based on what they read in the description. The final survey question asks consumers to indicate the likelihood that they would purchase the product. NFO seems to be conducting a$($n$)$

A$)$ sensitivity test.

B$)$ brand test.

C$)$ concept test.

D$)$ attitude test.

E$)$ prototype test.