What is good bacteria use for

Good bacteria are used in many useful processes as;

Fermentation processes, such as brewing, baking, and cheese and butter manufacturing. Chemical manufacturing, such as the production of ethanol, acetone, organic acids, enzymes, and perfumes. Pharmaceuticals, such as the manufacture of antibiotics, vaccines, and steroids.They also used in experiment analysis and in genetic engineering.Bacteria break down carbohydrates (sugars) and toxins, and they help us absorb the fatty acids which cells need to grow.

Ithink the answer is d.