A school committee conducted a survey to determine the amount of time students spent doing homework. The committee asked every fifth student who entered the school about the amount of time he or she spent doing homework. Were the results of the survey valid? A. No, because the committee did not survey a sample that is representative of the population. B. Yes, because the committee surveyed a sample that is representative of the population. C. No, because the committee did not survey everyone at the school. D. Yes, because the committee surveyed all the students.