Which preservatives are mentioned as examples?

• A. Salt, Sugar or Vinegar
• B. Oil, Salt, and Vinegar
• C. Sugar only
• D. Vinegar only

Answer: (A)

Salt, sugar and vinegar are classic simple preservatives. They work by making conditions unfriendly for microbes: salt and sugar draw moisture out of microbial cells through osmosis and create high solute concentrations, while vinegar lowers the acidity (pH) of the environment, inhibiting growth. This combination is commonly cited as examples of traditional preservation methods, so including all three is the best fit. Oil isn’t typically listed as a preservative in the same sense, and the other options either omit one or more of these common agents or rely on a single item, which doesn’t match how preservatives are usually presented.