In the oral tradition, each telling or singing of a story differed from the last.
a. true
b. false

Yes, the answer is definitely A - true. In the oral tradition, obviously, people didn't use written texts, they told their tales from memory. And of course they would add something, or remove something else, or use a different vocabulary from the person who told them that story. It cannot be told in the exact same way the previous person told it, it is impossible.

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Explanation:

The line between memoir and autobiography is a fuzzy one, especially in this modern literary era where writers are constantly blurring the boundaries between genres to create a new, exciting one. Like an autobiography, a memoir is a narrative that reveals experiences within the author's lifetime. But there are obvious and practical differences between the two similar genres.In essence, an autobiography is a chronological telling of one's experience, which should include phases such as childhood, adolescence, adulthood, etc., while a memoir provides a much more specific timeline and a much more intimate relationship to the writer's own memories, feelings and emotions.