It's definitely B. It's only Boston that has to be capitalised as it is the name of a town.
B would make the prose more difficult to read and thus interrupt the natural rhythm
They were in the forest dancing, Abigail drank blood, and Mercy Lewis was naked.
3x - y = 5
If you are looking for x, then
3x - y(0) = 5
3x = 5
x = 5/3
If you are looking for y,
3x - y = 5
3(0) - y = 5
-y = 5
-y / -1 , 5 / -1
y = -5
