When the Following Redox Equation Is Balanced with Smallest Whole $\to$

When the following redox equation is balanced with smallest whole number coefficients, the coefficient for zinc will be _____. Zn(s) + ReO₄^-(aq) $\to$ Re(s) + Zn²⁺(aq) (acidic solution)

A) 2
B) 7
C) 8
D) 16
E) none of the above