From the unbalanced equations below, identify the one that does not represent a redox reaction. A. H2CO3(aq) → CO2(g) + H2O(l) B. C(s) + H2O(g) → CO(g) + H2(g) C. S2O32- (aq) + I2(s) → S4O62+ (aq) + I-(aq) D. FeBr2(aq) + Br2(l) → FeBr3(aq)