Which of the Following Mixtures Would Result in a Buffered $\times$

Multiple Choice

Which of the following mixtures would result in a buffered solution?

A) Mixing 100.0 mL of 0.100 M HCl with 100.0 mL of 0.100 M NaOH.
B) Mixing 100.0 mL of 0.100 M NH₃ (K_b = 1.8 $\times$ 10^-5) with 100.0 mL of 0.100 M NaOH.
C) Mixing 100.0 mL of 0.100 M HCl with 100.0 mL of 0.100 M NH₃ (K_b = 1.8 $\times$ 10^-5) .
D) Mixing 50.0 mL of 0.100 M HCl with 100.0 mL of 0.100 M NH₃ (K_b = 1.8 $\times$ 10^-5) .
E) At least two of the above mixtures would result in a buffered solution.