A) Of options (a) - (d) below, highlight the (unbalanced) chemical equation that represents
 the combustion reaction of cellulose (like what we see with the wood burning in a
 campfire above)
 a) O, + H2O → C + CH1,05 + CO2
 b) C6H100, + O2 + C + CO, + H,O
 c) CH4,05 + CO2 → C+ O2 + H,O
 d) CO, + H2O → C.H.O. + O2