The people living in the colony of Jamestown had a very big problem with the swampy surroundings because the swamp was attracting lots of mosquitoes, and the mosquitoes were transporting diseases with them. Because there were lots of mosquitoes, people were getting stung by them on a daily basis and it happened very often that they would get some disease from them, and while some diseases did not caused big problems, some were fatal.
C. this is a clear appeal to emotion because it appeals to our emotions that get elicited when someone says "we, as human beings, ...". This is supposed to elicit our compassion and feelings of empathy towards other people.
