The correct option is A Saccharomyces cerevisiae
Saccharomyces cerevisie is a commonly used species of yeast that is responsible for one of the biggest beverage industries of the world, the alcohol industry. It produces carbon dioxide and ethanol, which are used in making beer and wine. Torulopsis utilis is a species of yeast that is used as a flavouring agent in processed foods and pet foods. Clostridium botulinum produces a toxin, which causes the disease botulism; however, it is also used commercially, in medicine, cosmetics and research.