It Is Estimated That the Proportion of Californians in Favor

Multiple Choice

It is estimated that the proportion of Californians in favor of Proposition 5 is between 0.4 and 0.6.The sponsors of the proposition would like to sample Californians and get a 95 percent confidence interval for the true proportion of people in favor of Proposition 5.They want to restrict the error level to 5 percentage points.The required sample size is then

A) 400.
B) 40.
C) 100.
D) 1,000.
E) none of the above.