A researcher conducted a one-sample z-test with alpha set to 0.05, and calculated a test statistic of 1.99. The null hypothesis was H0: μ = 500 and the critical values were +1.96 and -1.96. Which is the most appropriate interpretation of the result of this test?
A. Reject the null hypothesis - the population mean equals 500.
B. Reject the null hypothesis - there is evidence to suggest the population mean is not equal to 500.
C. Fail to reject the null hypothesis - there is not enough evidence to say that the population mean is different from 500.
D. Reject the null hypothesis - the sample mean does not equal 500.