In a 50.00 mL titration of 0.0500M HC2H3O2 (acetic acid) with 0.100 M NaOH: The reaction that determines the pH of the i

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In a 50.00 mL titration of 0.0500M HC2H3O2 (acetic acid) with
0.100 M NaOH: The reaction that determines the pH of the initial
point is:
Select one:
a. HC2H3O2 + OH- ⇆ C2H3O2- + H2O
b. None of the above is correct
c. HC2H3O2 + H2O ⇌ H3O + + C2H3O2-
d. C2H3O2- + H2O ⇋ HC2H3O2 + OH-