Which researcher or group of researchers below determined that DNA is the transforming principle? Pick the best answer. Select one: a. Alfred Hershey and Martha Chase b. Albrecht Kossel c. Frederick Griffith d. Maurice Wilkins and Rosalind Franklin e. Friedrich Miescher f. Erwin Chargaff g. Charles Yanofsky h. Heinz Fraenkel-Conrat and Bea Singer i. Phoebus Levene j. James Watson and Francis Crick k. Barbara McClintock I. Oswald Avery, Colin MacLeod and Maclyn McCarty.