Which of the following statements is true?

A) The sample mean is represented by x¯ and the population mean is represented by μx.
B) The population mean is represented by x¯ and the sample mean is represented by μx.
C) The sample mean is represented by μx and the population mean is represented by x¯.
D) The population mean is represented by μx and the sample mean is represented by x¯.
E) Both the sample mean and the population mean are always represented by x¯.