Following are the answers, which are listed below,
Explanation:
PART A
The best summarizes a theme in the story is
Revenge is justified when a person is betrayed by someone they trusted.
PART B
"None of these men of iron have,' he said sententiously. They have no hearts."
"Was he deluding himself with his own fancies, or had Horrocks actually held him back in the way of the train? Had he just been within an ace of being murdered?"