The Critical Value Method for Hypothesis Testing Relies on the Fact

The critical value method for hypothesis testing relies on the fact that

A) if the null hypothesis is false,then it is very unlikely to observe a test statistic more extreme than the critical value.
B) if the null hypothesis is true,then it is very unlikely to observe a test statistic more extreme than the critical value.
C) if the null hypothesis is true,then it is very likely to observe a test statistic more extreme than the critical value.
D) if the alternative hypothesis is false,then it is very unlikely to observe a test statistic more extreme than the critical value.