What did the experiment by Fred Griffith in 1928 with the R and S strains of Streptococcus pneumoniae demonstrate?
A) DNA was the genetic material in cells.
B) R strain phenotype could spontaneously revert to S strain phenotype.
C) Genetic material from one strain could be transferred to another strain.
D) The ability of these bacteria to kill mice.
E) That some strains of Streptococcus were not pathogenic.
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