Given a text T, and several options, according to the question posed in the text T to choose the most appropriate option from the options as the answer, please directly output the most appropriate option, do not need to output the explanation.

For a two-sided confidence interval, an increase in the degree of confidence will result in:
Option A:a wider confidence interval.
Option B:a narrower confidence interval.
Option C:no change in the width of the confidence interval.

Answer: A