Which of the Following Indicators Would Be the Best to Use

Multiple Choice

Which of the following indicators would be the best to use when 0.050 M benzoic acid (K_a = 6.6 × 10^-5) is titrated with 0.05 M NaOH?

A) bromphenol blue, pH range: 3.0-4.5
B) bromcresol green, pH range: 3.8-5.4
C) alizarin, pH range: 5.7-7.2
D) phenol red, pH range: 6.9-8.2
E) phenolphthalein, pH range: 8.0-10.1