The Titration Curve for the Titration of 0

The titration curve for the titration of 0.100 M Na₂CO₃(aq) with 0.100 M HClO₄(aq) is:
The main species in the solution after the addition of 35 mL of HClO₄ are

A) HCO₃^-,H₂CO₃,Na⁺,and ClO₄^-.
B) H₂CO₃,Na⁺,and ClO₄^-.
C) CO₃^2-,HCO₃,Na⁺,and ClO₄^-.
D) CO₃^2-,Na⁺,and ClO₄^-.
E) HCO₃^-,Na⁺,and ClO₄^-.