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.