The answer is C, We. I hope this helped, let me know if you need further explanation.
When talking about recycling, people don't seem to consider the recycling of clothing.
The comma should be placed between the first use of recycling and people. The subordinate clause is "when talking about recycling". This is a clause because of the word "when". When makes the reader wonder when what? The main clause is "people don't seem to consider the recycling of clothing."
If you could send over a picture of the passage that'll be great but the answer is that he is most famous for his "I have a Dream" speech. He wanted the US to be void of segregation and racism.
Answer:
I think its biography. I hope it works.
~best wishes
