The "National Panel Diary" (NPD Group)is

The "National Panel Diary" (NPD Group) is

A) concerned with size and nature of the television commercial audience.
B) an advertisement readership service.
C) a well-known diary panel concerned with the consumption of various goods and services.
D) an annual service provided to consumers reporting on the average family's consumption behavior.
E) a group that primarily tracks food-related trends in the U.S.