Because 25 percent of the students in my morning statistics class watch eight or more hours of television a week, I conclude that 25 percent of all students at the university watch eight or more hours of television a week. The most important logical weakness of this conclusion would be. a. relying on any sample instead of surveying every studentb. using a sample that may not be representative of all studentsc. failing to correct for unconscious interviewer biasd. assuming cause and effect where none exists