Answer the Following Questions That Refer to the Unbalanced Reaction $\rightarrow$

Answer the following questions that refer to the unbalanced reaction shown below as it occurs in acidic solution:
_______ Cr₂O₇^2- (aq) + _______ I^-(aq) $\rightarrow$ _______ Cr³⁺(aq) + _______ I₂(s)
-Determine the coefficient for water in the balanced equation for the reaction.

A) 1
B) 2
C) 3
D) 6
E) 7