The Three Confidence Intervals Below Were Constructed from the Same $31.3 < \mu < 40.7$

Multiple Choice

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 98%.
Which is the confidence level at 98%?

A) $31.3 < \mu < 40.7$
B) cannot be determined
C) $30.3 < \mu < 41.7$
D) $29.3 < \mu < 42.7$