Which of the Following Statements About the Component of the Flu

Which of the following statements about the component of the flu vaccine and its intended function is True?

A) Aluminum is included to prevent the growth of bacteria during vaccine preparation and storage.
B) Formaldehyde is used to inactivate toxins from the virus or bacteria that may have been present during production.
C) Gelatin or sorbitol are used to enhance the ability of the immune system to detect the virus.
D) Antibiotics are used as a preservative in multidose vials of vaccine in order to prolong their shelf life. Antibiotics allow the vaccine to withstand extreme temperature changes.