Write a balanced equation to show the reaction of gaseous ethane (C₂H₆) with gaseous oxygen to form carbon dioxide gas and water vapor.
a) 2C₂H₆ + 5O₂ → 4CO₂ + 6H₂O
b) C₂H₆ + 3O₂ → 2CO₂ + 3H₂O
c) 2C₂H₆ + 7O₂ → 4CO₂ + 6H₂O
d) 3C₂H₆ + 10O₂ → 6CO₂ + 8H₂O