In the 1920s, a Dye That Stained DNA a Bright

In the 1920s, a dye that stained DNA a bright purple was developed.From this dye, biologists concluded that

A) all organisms had the same amount of DNA.
B) DNA was present in higher amounts in gametes than it was in somatic cells.
C) DNA had a simple chemical structure.
D) the amount of DNA varied among species.
E) DNA was found in the cytoplasm of cells.