6. What is the function of hemagglutinin in the influenza virus? (A) Hemagglutinin is the name of the reverse transcriptase enzyme in the influenza virus. (B) Hemagglutinin is involved in assembling the membrane envelope that the virus uses as a cloak when it leaves an infected cell. (C) Hemagglutinin is part of the protein capsid of the influenza virus. (D) Hemagglutinin helps release new viruses from infected cells. (E) Hemagglutinin is the protein that helps the influenza virus attach to host cells.