In 1928, Frederick Griffith's Experiments with Streptococcus Pneumoniae Suggested That

In 1928, Frederick Griffith's experiments with Streptococcus pneumoniae suggested that

A) DNA was conclusively the molecule of heredity.
B) attenuated R (rough) bacteria easily revert to the wild type (virulent) .
C) bacteria do not incorporate the DNA of other bacteria.
D) heat- killed bacteria could somehow "transform" live bacteria.
E) all of the above