The X- ray diffraction pattern for DNA suggested to Wilkins and Franklin all of the following features about DNA EXCEPT

A) a DNA molecule has a uniform diameter of 2 nanometers.
B) in a DNA molecule, A pairs with T and G pairs with C.
C) the DNA molecule consists of repeating subunits.
D) a DNA molecule is helical.
E) the phosphate- sugar "backbone" of the molecule is on the outside of the DNA helix.