Which of the Following Are Two-Tailed Tests

Multiple Choice

Which of the following are two-tailed tests?

A) H₀: μ ≤ 10, H_A: μ > 10
B) H₀: μ = 10, H_A: μ ≠ 10
C) H₀: μ ≥ 400, H_A: μ < 400
D) Both H₀: μ ≤ 10, H_A: μ > 10 and H₀: μ ≥ 400, H_A: μ < 400