After the passage of the Pure Food and Drug Act, labels such as this on a can of peas were common. What purpose do labels such as this one serve?
A) They served to curtain mass production of products from only certain manufacturers. B) They serve as a seal of purity and guarantee that the product meets federal requirements. C) They were provided to ensure that the same preservatives were used in all processed food. D) They were required to ensure that price gouging was not taking place on consumer products.