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Sauerkraut and fermented pickles are preserved chiefly by

  • A.The carbon dioxide dissolved in the covering brine
  • B.The lactic acid produced during the fermentation
  • C.The heat applied during the fermentation stage
  • D.The sugar drawn out of the vegetable by the salt

Answer: B

Acid is the preservative: a pH near 3.5 stops the growth of spoilage and pathogenic bacteria. Salt selects which organisms may grow and helps draw out juice, but at the levels used it does not itself preserve the product, and no heat is applied during fermentation.

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