A student was given the task of titrating a 20.0 mL sample of 0.10 M HCl with 0.10 M NaOH. The HCl was placed in an Erlenmeyer flask along with two drops of an appropriate acid-base indicator.

An equation for the reaction that occurs during the titration is:

HCl + NaOH → NaCl + H2O

What volume of NaOH is required to completely neutralize the HCl sample?

A) 10.0 mL
B) 15.0 mL
C) 20.0 mL
D) 25.0 mL