The greatest effect of the westernization and commoditization of culture is that they created a global culture that allows competing marketers to drive down product costs. The answer to your question is A. I hope this is the answer that you are looking for and it comes to your help.
Bacteria in our gut help to protect us by crowding out some of their dangerous relatives that can cause disease. Other good bacteria have been used in medicine to create antibiotics, and others still are used in food production to make fermented foods (think sauerkraut, yogurt, kimchi and kombucha.)
