IMAT 2013 Q51 [Balancing Equations]

What value does c need to be so that the following equation can be balanced?

4KMnO_4 + aH_2SO_4+ 5C_2H_5OH → 4MnSO_4 + bK_2SO_4 + 5CH_3CO_2H + cH_2O

A. 21
B. 11
C. 16
D. 17
E. 26