In Each of the Following Cases, We Wish to Test $\mu$

Multiple Choice

In each of the following cases, we wish to test the null hypothesis H₀: $\mu$ =10 vs. H_a: $\mu$ $\neq$ 10. In which case can this null hypothesis not be rejected at a significance level $\alpha$ = 0.05?

A) 90% confidence interval for $\mu$ is (9 to 12) .
B) 95% confidence interval for $\mu$ is (11 to 21) .
C) 98% confidence interval for $\mu$ is (4.4 to 9.4) .
D) 99% confidence interval for $\mu$ is (5 to 9) .