Consider a Normally Distributed Population

Multiple Choice

Consider a normally distributed population.Which two of the following actions will result in the greatest increase in the width of a confidence interval for the mean?
(i) increasing the confidence level
(ii) decreasing the confidence level
(iii) increasing the sample size
(iv) decreasing the sample size
(v) decreasing the standard deviation

A) (i) and (iii)
B) (ii) and (iv)
C) (ii) and (iii)
D) (i) and (v)
E) (i) and (iv)