The three confidence intervals below were constructed from the same sample. One of them was computed at a confidence level of 90%, another at a confidence level of 95%, and another at a confidence level of 99%. Which interval is most likely the confidence level at 99%?
Select one:
a. (38.4, 47.6)
b. (36.5, 49.5)
c. (37.6, 48.4)
d. cannot be determined