Explain how the results of chaff's experiment may have helped Watson ans crick determine the structure of DNA?

Chargaff's experiment showed that the amount of adenine in DNA is equal to the amount of thymine, and the amount of guanine is equal to the amount of cytosine. This provided important clues for Watson and Crick to propose the complementary base pairing structure of DNA, where adenine pairs with thymine and guanine pairs with cytosine. This information helped them determine the double helix structure of DNA.