A survey of 625 randomly selected students was conducted to determine student opinior about music. The survey reported that 36 percent of the students surveyed preferred country/western music. The survey estimate had a margin of error of 4 percentage point: margin of error is reported because (A) Sample proportions vary from sample to sample. (B) Students may intentionally respond incorrectly. (C) Students may misunderstand the survey questions. (D) The people doing the survey may have recorded results incorrectly