The corrcet answer would be relational.
A memoir is a slice of life. You can document anything, including the death of a loved one, the birth or adoption of a child, summer camp, a religious awakening, becoming an adult, journeying to a different country, or adjusting to the new home, just to name a few ideas. If you lived it, you can write it.
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The answer to the question is B.
Please give feedback on my answer. Thanks.