NCIS" has an average national household rating of 2.5. This means that: Question 42 options: a) an average of 2.5 million households watched "NCIS" for the entire season b) an average of 2.5 million households watched commercials in "NCIS" c) 2.5 percent of the television households in the country were watching "NCIS" d) 2.5 percent of the households watching television were watching "NCIS