Consider the pH range for the following indicators and select the most appropriate indicator for the titration of an HCN solution with a NaOH titrant.
A. bromothymol blue, pH range 6.0-7.6
B. methyl red, pH range 4.2-6.3
C. thymol blue, pH range 1.2-2.8
D. phenolphthalein, pH range 8.3-10.0
E. bromophenol blue, pH range 3.0-4.6