28. What does the article suggest about the role of lactobacillus in gut health? (A) It balances the gut by eliminating all pathogens and raising gut pH. (B) It reduces acidity in the intestines, which improves nutrient absorption. (C) It creates a low-pH environment that favors beneficial microbes and inhibits harmful ones. (D) It works mainly in the large intestine to regulate digestive enzymes.