Answer:
The focus of the book is what is now known as post-traumatic stress disorder (PTSD). Over time, the author explains how soldiers' stress and demand for aid have evolved. They use the word "shell shock" as an illustration of how the term came to be used. Compared to the names it was afterwards referred to, the author feels this two-syllable phrase was simpler and more straightforward. "The pain is completely buried under jargon," it is said. I'll bet if they had still been calling it "shell shock," some of those Vietnam veterans might have received the attention they needed. Authors argue that troops were better served by the original word, shell shock, since it didn't have a long phrase and many more syllables. When a soldier is "on the edge of a nervous collapse," he or she is said to be on the verge of a nervous breakdown.
Explanation:
Write in your own words to avoid plagiarism. (teachers are smart)
Answer: I would say the best answer choice in my opinion would be letter 
or “so that the audience can understand the motivations of the characters in the play.”
Explanation: Hope this helps! Have a fantastic day! <3
Which of what? or there answers or examples to choose from?
