Which of the Following Statements About the Types and Subtypes

Which of the following statements about the types and subtypes of the influenza (flu) virus is false?

A) Of the three major types of flu virus (A, B, and C) , only Type A can occur in humans, other mammals, and birds.
B) Flu subtype is determined by the kinds of proteins representing the H and N protein spikes making up the capsid of the virus.
C) The A(H2N2) and the A(H3N2) strains of the virus require different vaccines.
D) High mutation rates create more diversity in strains of flu than does genetic recombination.
E) Genetic recombination between flu strains from different species is common.