<span>A.)their family history and heritage
</span>
I think it should be muscles of the veins and arteries since they move blood through the bloodstream
You didn't provide the sentences, however, they probably contain things like vivid descriptions of things or their smells or how they feel when you touch them. If they are extremely realistic, then they are really vivid and this should be your correct sentence. Let me know if I'm wrong.
The correct answer is Keller states her main idea in the first paragraph and then uses a chronological recollection to support the main idea.
In the first paragraph, Keller recalls when she met her teacher, Anne Mansfield Sullivan, and thinks of it as the best and most important day of her life. This idea is supported by the following paragraphs since all of them retell in chronological order what her teacher taught her, how she did it and how Keller wonderfully felt about her achievements.