A Marketing Company Reviewing the Length of Television Commercials Monitored

A marketing company reviewing the length of television commercials monitored a random sample of commercials over several days. They found that a 95% confidence interval for the mean length (in seconds) of commercials aired daily was (23, 27) . Which is true?

A) 95% of all the commercials aired were between 23 and 27 seconds a day.
B) We're 95% sure that the mean commercial length is between 23 and 27 seconds.
C) 95% of the commercials they checked were between 23 and 27 seconds long.
D) Commercials average between 23 and 27 seconds long on 95% of the days.
E) 95% of all samples would show mean commercial length between 23 and 27 seconds.