Which of the following would result in the narrowest confidence interval? A. 80% confidence level and sample size n = 20 B. 99% confidence level and sample size n = 20 C. 80% confidence level and...

Which of the following would result in the narrowest confidence interval?

A. 80% confidence level and sample size n = 20

B. 99% confidence level and sample size n = 20

C. 80% confidence level and sample size n = 100

D. 99% confidence level and sample size n = 100