Answer:
B.
Explanation:
If I remember correctly I've taken this test before on edge.
One and four cuz they use the correct tence of the words
Some internet sources are not reliable that anybody can edit i would say some examples but i can not state them here,
Just take what you are going to talk about it your paper and summarize it. Make sure to put Down's Syndrome in your thesis though since that is the main topic.