I've heard the Ganges River is very polluted and filthy. Indians throw trash in there. It was known for its beauty. People bathed in its waters believing it was holy. That is one reason it is so dirty. It would take a very long time considering the fact that the Ganges River is one of the longest in India, with the Indus River at first place.
This description fits any random British settler from the colonies. They were taught how to plant tobacco and eventually they made an entire business out of it, even kicked out Natives out of their lands so as to increase their farms.
The answer is drug use among the troops.
Drugs were rampantly used by soldiers to make them fearless, have more energy and renew themselves of their low morale in the battle field. This was highly used even by US soldiers, which in the end became a problem.
B) could be waived in a time of emergency such as war.