A 95% confidence interval for p, the proportion of all shoppers at a large grocery store who purchase cookies, was found to be (0.236, 0.282). The point estimate and margin of error for this interval are:

a.) Point estimate = 0.236; Margin of error = 0.046
b.) Point estimate = 0.259; Margin of error = 0.023
c.) It is impossible to know the point estimate and margin of error without knowing the sample size.
d.) Point estimate = 0.236; Margin of error = 0.282
e. ) Point estimate = 0.259; Margin of error = 0.046