A New York Times poll on women's issues interviewed 1025 women randomly selected from the United States, excluding Alaska and Hawaii. The poll found that 47% of the women said they do not get enough time for themselves. The poll announced a margin of error 3% for 95% confidence in its conclusions. What does this margin of error account for?

a. Sampling variation b. Bias due to undercoverage, non-response, question wording, etc. c. Measurement errors d. Non-random sampling e. Non-Normal data