The correct answer is B. box, because after the word "box" she is describing what she found in it. They are two different things, so you need a comma after box.
The "theme of the problem" is what it likely means i<span>n President Kennedy's 1963 Civil Rights Address in the phrase "heart of the question" :
"</span><span>The heart of the question is whether all Americans are to be afforded equal rights and equal opportunities, and whether we are going to treat our fellow Americans as we want to be treated."</span><span>
I hope my answer has come to your help. God bless and have a nice day ahead!
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D. Which aspects of the topic to discuss. I believe this to be the answer because if you choose the point of view of a farmer, for example, a farmer would not know how to create a sword.