| Why are heavy fuels not usually prone to the problems of microbiological infection? |
| A) Heavy fuels are subjected to better refining processes which prevent the formation of these growths. |
| B) Most heavy fuels contain chemicals which prevent the growth of fungi and other bacteria. |
| C) Microbiological infection does not affect marine fuel but rather the personnel who are involved with the handling, storage and purification of the fuel. |
| D) The necessary nutrients that the organisms feed on are in a more complex form and not available for microbial degradation. |
