The answer is the last choice, or D.
When you summarize, you're supposed to gather the most important points and rewrite them in a shorter and more simplified fashion. The first three choices include mostly everything you should do when writing a summary. Usually when you summarize, it's for a concluding paragraph, so writing an introductory paragraph wouldn't be it.
B. The poem expresses the poet’s feelings of desperation.
The falling action on a plot structure diagram depicts the events that occur after the climax.
She does not seem impulsive: she seems to be working steadily towards the goal (defeating the Nazis) (so she is also not unsteady).
I think that the best word to describe her is "resilient" -for example because she went back to work after sustaining an injury.
