The correct answer is: [B]:
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"<span>The sixth-grade students liked volunteering their time to read to the elderly people in the hospital. Reading made them happy."
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Memoir is a personal legacy written so we can call it a historical source but not document. It is not an evidence, a report or not even a record. It is more like an autobiography or a biography from memorial times. It is a legacy written by a person for a person.
C. To advertise a new pair of tennis shoes
The answer is Many People Do Not Like the Extreme Solutions offered by environmentalists. I know because I took this test and got it back.