Hershey and Chase experimented with radioactively-labeled phosphorus and sulfur to determine that DNA, not protein, is the genetic material. Which of the following was essential to this confirming experiment?
A) Sulfur is present in amino acids in the protein coat of phage.
B) Phosphorus is present in high amounts in DNA.
C) Sulfur is not present in DNA.
D) Phosphorus is not present in amino acids in the protein coat of phage.
E) All of the above were critical to demonstrating that DNA is the genetic material.