Which of the following shows the conservation of mass during cellular respiration?
A. 3 C O2 + 3 H2 O + energy → 3 C6 H12 O6 + 3 O2
B. 6 C O2 + 6 H2 O + energy → C6 H12 O6 + 6 O2
C. C6 H12 O6 + 6 O2 → 6 C O2 + 6 H2 O + energy
D. 6 H2 O + C6 H12 O6 → 6 O2 + energy