We Have Calculated a 95% Confidence Interval and Would Prefer

We have calculated a 95% confidence interval and would prefer for our next confidence interval to
Have a smaller margin of error without losing any confidence. In order to do this, we can
I. change the z value to a smaller number.
II. take a larger sample.
III. take a smaller sample.

A) I and III
B) I and II
C) III only
D) I only
E) II only