Find a 95% Confidence Interval for the True Population Proportion $20.6 \%$

Multiple Choice

Find a 95% confidence interval for the true population proportion.
-In a survey of 257 female employees of a large company, 21% said that they had experienced some form of sexual harassment while working for the company.

A) $20.6 \%$ to $21.4 \%$
B) $14.8 \%$ to $27.2 \%$
C) $8.5 \%$ to $33.5 \%$
D) $20.9 \%$ to $21.1 \%$