A Gallup Poll in November 2012 found that 54% of the people in the sample said they wanted to lose weight. The poll's margin of error for 95% confidence was 4%. This means that:

a) the poll used a method that gets an answer within 4% of the truth about the population 95% of the time.

b)we can be sure that the percent of all adults who want to lose weight is between 50% and 58%.

c) if Gallup takes another poll using the same method, the results of the second poll will lie between 50% and 58%.