What are the reactants in the following chemical reaction?
C6H12O6 + 6 O2 → 6 CO2 + 6 H2O
A. Carbon dioxide (CO2) and water (H2O)
B. Carbon dioxide (CO2) and oxygen gas (O2)
C. Glucose (C6H12O6) and oxygen gas (O2)
D. Glucose (C6H12O6) and water (H2O)