I would say the answer is D.
This is because of the way she talks about how she is uncomfortable with the hijab in the begging but releases that idea. Instead she goes into a more “I want to be as comfortable as those girls” idea and the story/excerpt tends to follow that idea until the end of it. Also the central ideas seem to be revealed at ends of stories for example she even states, “I was even a bit jealous” and “They looked so at peace with their identity and everybody got to know and respect them of their own terms.” Which implies she wants to have that sense of comfort in herself that she doesn’t have unlike the other girls.
Hope this helped!! :)
In the Vietnam it was still called “shell shock” PTSD was not truly exploited until Afghanistan and Iraq. Vietnam vets were treated much differently because of the general populations view on the war and politics set forth after JFK’s death
In Literature, Subject is referred as a topic. The theme is the opinion expressed on the subject. So basically, both are entirely different. Hope this answers your question.