The answer is D. One aspect of T.S Eliot's poetry that makes it so difficult is his usage of many literary elusions.
B he uses imagery to suggest the character is unreliable
Yes some of confucius's idea about people and society are relevant today because he had some great ideas and ways of thinking however some things are no longer acceptable in today's society. like mourning for 3 years over the loss of a parent. Lao-tzu's philosophy is somewhat compatible with the modern world because meditation is still a good for people but other things like gaining wisdom through understanding the universe isn't practical anymore because we know so much more about the universe than we did back in Lao-tzu's time.
Because they would spy, smuggled, and sabotaged under the Nazis' noses