If We Are Interested in Making the Case That the Proportion

If we are interested in making the case that the proportion in Population 1 is larger than the proportion in Population 2, and we plan to use the contrary position as the null hypothesis, then the

A) null hypothesis should state $\pi$ ₁- $\pi$ ₂ < 0.
B) null hypothesis should state $\pi$ ₁- $\pi$ ₂ > 0.
C) alternative hypothesis should state $\pi$ ₁- $\pi$ ₂ $\ge$ 0.
D) alternative hypothesis should state $\pi$ ₁- $\pi$ ₂ < 0.
E) none of the above.