We Have Calculated a 95% Confidence Interval and Would Prefer

Multiple Choice

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