The Confidence Level for a Confidence Interval for a Mean

The confidence level for a confidence interval for a mean is

A) the probability the procedure provides an interval that covers the sample mean.
B) the probability of making a Type 1 error if the interval is used to test a null hypothesis about the population mean.
C) the probability that individuals in the population have values that fall into the interval.
D) the probability the procedure provides an interval that covers the population mean.