In DNA from Any Species, the Amount of Adenine Equals

Multiple Choice

In DNA from any species, the amount of adenine equals the amount of thymine, and the amount of guanine equals the amount of cytosine. Which of the following investigators was (were) responsible for this discovery?

A) Frederick Griffith
B) Alfred Hershey and Martha Chase
C) Oswald Avery
D) Erwin Chargaff
E) Matthew Meselson and Franklin Stahl