In a poll of 1,000 adults, 57% believed that there was too much inappropriate content on TV. A 95% confidence interval for the proportion is given as 0.54 to 0.60. What is the margin of error of this poll?
A. 0.54
B. 0.015
C 0.03
D. 0.57
.57 - .03 = .54
.57 + .03 = .60
Selection is C.