Which of the Following Is TRUE

Which of the following is TRUE?

A) Purchase data obtained through a panel (e.g. NPD) is more accurate than scanner data (e.g. BehaviorScan) .
B) A major advantage of Nielsen data (Nielsen Retail Index) over NPD (National Panel Diary) data is that it covers products and services not covered by the NPD data.
C) A major advantage of NPD data over Nielsen data is that it can determine the relative importance of store types in the sale of products such as batteries.
D) The recognized organizations in panel operation (e.g. NPD) select panel members by matching socioeconomic characteristics of the panel membership with the population. This guarantees that the panel is representative of the larger group.
E) They are all false.