Maybe it could be about the benefits and challenges?
I believe the answer is c also
Answer:
Bobo is, as his name suggests, somewhat dimwitted, but he is basically honest and appears to be a loyal friend. When he comes to Walter's apartment to deliver the bad news about the insurance money, he is so mannerly and polite to the women in the Younger household that he appears almost ridiculous.
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Elephants are very wise and can think similar to how a human can think.
Compound. The simple sentence would be 'they were very busy'