How did the discovery of the DNA double helix by Watson and Crick contribute to our understanding of genetic information storage and replication?

• A. It demonstrated that proteins were the primary carriers of genetic information.
• B. It proved that RNA was the main genetic material in cells.
• C. It showed that DNA could not be the genetic material due to its simplicity.
• D. It provided a structural basis for understanding how genetic information is stored and replicated.

Answer: (D)