The answer is B.
Charley noting/remembering the way Mr.Taft went is an implication that he will eventually have to remember the direction so he can follow him.
It should be near David and Ed
Problems that may result from taking revenge would be potentially creating more problems between people. It is better to be the bigger person, accept and leave a situation as it is.
They sent letters to each other a couple of times. Many would agree that there is a classic story of the homosexual tensions bubbling just beneath the surface between Hemingway and Fitzgerald, so maybe there you could find room for jealousy. Both of them had strong perceptions of what it meant to be gay, and they stated how to interact with their gay friends. Perhaps if they had worked together, they could have done more for this, let us call it "project".
D attending and communicating