Assume That the Conductivity of a Solution Depends Only on the Total

Multiple Choice

Assume that the conductivity of a solution depends only on the total concentration of dissolved ions and that you measure the conductivity of three different solutions while performing titrations in which
I.50.00 mL of 0.100 M aqueous CH₃CO₂H is titrated by addition of 0.100 M NaOH.
II.50.00 mL of 0.100 M aqueous NaBr is titrated by addition of 0.100 M AgNO₃.
III.50.00 mL of 0.100 M aqueous CaCl₂ is titrated by addition of 0.100 M Na₂CO₃.
-Which of the above graphs corresponds to titration III?

A) graph (1)
B) graph (2)
C) graph (3)
D) None of the graphs