Answer:
Malik stubbornly resists change.
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Answer: I think it's "he wants students to feel comfortable when they're in his office." (A?) 
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Answer:
Calpurnia is being motherly, taking the kids to church after washing them the night before, making sure they were dressed and ready to go to church that day, protecting them from a criticizing negro woman. 
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A, collision because you need 2 people to collide to have a collision not only one thing/person.