Consider a hypothesis test with H0 : μ = 70 and Ha : μ < 70. Which of the following choices of significance level and sample size results in the greatest power of the test when μ = 65?
A. α = 0.05, n = 15
B. α = 0.01, n = 15
C. α = 0.05, n = 30
D. α = 0.01, n = 30
E. There is no way of answering without knowing the strength of the given power.