Which Experiment Listed Below Would Provide a Titration Curve That

Which experiment listed below would provide a titration curve that resembles the titration shown below?

A) Titrating NH₃ with standard NaOH (delivered from the burette) .
B) Titrating NH₃ with standard HCl (delivered from the burette) .
C) Titrating H₃PO₄ with standard NaOH (delivered from the burette) .
D) Titrating Na₃PO₄ with standard HCl (delivered from the burette) .
E) Titrating Na₃PO₄ with standard NaOH (delivered from the burette) .