90. Please choose the correct description for confidence level. (A) Confidence level is the probability that the sample mean lies within a certain interval. (B) Confidence level is the probability that the true mean lies within a certain interval. (C) Confidence level is the range of values within which the population mean is expected to lie with a certain probability. (D) Confidence level is the range of values within which the true value is expected to lie with a certain probability, (E) None of the above.