The distance is : 4117 km
The answer is letter C.
We have boasted the protection of Great Britain, without considering, that her motive was interest not attachment; that she did not protect us from our enemies on our account, but from her enemies on her own account, from those who had no quarrel with us on any other account, and who will always be our enemies on the same account.
In this sentence, it is admitted that Great Britain protected the colonies, which would be for the gain of the colonies, but also that is did so for its own gain, so the gain was on both parts, "mutual" - I think that this is the correct answer.
Missing context (please provide picture?
