Nielsen Media Research Collects National TV Ratings by Using a "People

Nielsen Media Research collects national TV ratings by using a "people meter." This is a box that is attached to TV sets,VCRs,DVRs,cable boxes,and satellite dishes in about 20,000 households across the country.A viewer uses the remote to signal the people meter that he or she is watching a TV program.The box then transmits the viewing information to the Nielsen Company.The information Nielsen is collecting is referred to as __________.

A) internal secondary data
B) interactive industry data
C) sensitivity data
D) external secondary data
E) observational data