Which row provides the description of a hydrogen-oxygen fuel cell?
- Achemical product: hydrogen and oxygen; comparison: hydrogen has a lower energy content by mass than petrol
- Bchemical product: hydrogen and oxygen; comparison: a renewable fuel may be used in a fuel cell, a petrol engine uses a non-renewable fuel
- Cchemical product: water only; comparison: hydrogen has a lower energy content by mass than petrol
- Dchemical product: water only; comparison: a renewable fuel may be used in a fuel cell, a petrol engine uses a non-renewable fuel