A Sample of 250 People Resulted in a Confidence Interval

A sample of 250 people resulted in a confidence interval estimate of between 0.14 and 0.20 for the proportion of people who believe that tax increase proposed by the federal government is justified. Based on this information, what was the confidence level used in this estimation?

A) approximately 79%
B) 95%
C) approximately 36.9%
D) approximately 1.26%
E) approximately 90%