The Major Difference Between Noninfective Strains of Haemophilus Influenzae and Highly

The major difference between noninfective strains of Haemophilus influenzae and highly infective strains is that

A) the infective strains have genes for glycolysis that the noninfective strains lack.
B) the noninfective strains lack the enzymes needed to synthesize amino acids.
C) the infective strains have surface proteins that attach the bacterium to respiratory tracts.
D) the noninfective strains lacks open reading frames.
E) the infective and noninfective strains have different regulatory sequences.