The Redox Reaction (Unbalanced), Cl₂→ClO₃ ^- + Cl ^-

The redox reaction (unbalanced) , Cl₂→ClO₃ ^- + Cl ^- , occurs in alkaline solution. The number of electrons transferred in the balanced equation is:

A) 2
B) 4
C) 6
D) 8
E) 5