The answer is:
B. Grieving is considered cowardly and serves for the weak of heart.
In King Claudius' lines from "Shakespeare," he expresses to Hamlet that he should not be sad over the loss of his father. First, because it is the natural law of life - parents die and their children outlast them. Secondly, it is not manly - mourning a father is not a masculine attitude a man should possess. Likewise, such behavior belongs to those who have a sensitive heart and a weak mind. He also suggests that Hamlet starts calling him father.
There is a number of words or phrases that you could use to help smooth the transition between sentence 1 and sentence 2, and here are some of them: also, in addition, additionally, furthermore, moreover, on top of that, etc. The meaning of the second sentence adds on top of the first one - so any of these transition words would be a good choice.
It's definitely B. It's only Boston that has to be capitalised as it is the name of a town.