Why Did Scientists Initially Think DNA Would Be a Poor

Why did scientists initially think DNA would be a poor candidate for the hereditary information within a cell?

A) Griffith's experiments suggested that protein was the hereditary material.
B) Studies showed that viruses lacking DNA passed genetic traits to the next generation.
C) DNA was shown to be made of only four different kinds of nucleotides.
D) The work of Franklin and Wilkins showed that DNA could not be the hereditary material.