In constructing confidence interval with known population standard deviation (s=8), the sample size is raised from n=64 to n=256 while the confidence level is held fixed at 95%. This will
a. reduce the width of the confidence interval by 75%
b. leave the width of confidence interval unchanged
c. double the width of confidence interval
d. reduce the width of the interval to one-half
e. raise the width of the interval by 100%