Please choose the correct solution to the question: How can you extend freshness in cut flowers?

Solution1: Add 1/2 cup buttermilk to an almost full vase of cold water, insert your flowers, this will preserve the flowers.

Solution2: Add 1/2 cup of 7 up to an almost full vase of cold water, insert your flowers, this will preserve the flowers.

Answer format: solution1/solution2