Part A: Which is a central idea the author develops over the course of the article? O A. A person's diet has a profound impact on one's emotional state.
O B. Studying a mouse's reactions to certain foods Informas humans' dietary choices.
O C. What people consume as children has a permanent effect on their microbiota.
O O. It is essential that people expand their understanding of how their diet affects the organisms living inside them.
Part B: Which detail from the article best supports the answer to PartA?
O A "Gut bacteria produce hundreds of brain chemicals, including about 95 percent of the body's serotonin, which influences mood." (paragraph 2)
O B. We need to think about choosing food that not only nourishes us...but also feeds these bacteria." (paragraph 3)
O C. We have a lot of evidence that childhood is a really important time...(paragraph 6)
O D.'Fermented foods, like sauerkraut, kimchi, yogurt, and kefir, are among them." (paragraph 8)