Which statement best describes how Watson and Crick's model used other scientists' work to create a model of DNA? O They used Chargaff's rule to determine that it contains ribose sugar. O They used Franklin's photo to determine that DNA was a double helix. O They used Levene's work to determine the number of base pairs in each strand. O They used Nirenberg and Matthei's studies to determine that DNA is made of nucleotides.

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