Answer
For starters, it promotes eating foods rich in probiotics and prebiotics — two compounds essential for a healthy gut. Probiotics are live bacteria found in foods like yogurt, kefir, tempeh, kombucha, and unpasteurized fermented vegetables, such as sauerkraut, pickles, and kimchi.
Around 4.1 billion years ago the first single celled organism appeared
The answer is A because without the mitochindria, the cell dies
