You Are to Determine the Amount of Vitamin C (Ascorbic $\to$

You are to determine the amount of vitamin C (ascorbic acid) in orange juice by redox titration.The ascorbate,C₆H₇O₆^-,in the juice reacts with triiodide,I₃^- to form dehydroascorbate,C₆H₅O₆^-,and iodide,I^-.How many electrons are transferred in the reaction? The reaction describing the titration is given below. C₆H₇O₆^-(aq) + I₃^-(aq) $\to$ C₆H₅O₆^-(aq) + 2 H⁺(aq) + 3 I^-(aq)

A) 1
B) 2
C) 4
D) 0
E) It is impossible to tell.