The community health nurse is developing a program to decrease the incidence of meningitis in adolescents and young adults. Which nursing action is most important?

a. Vaccinate 11- and 12-year-old children against Haemophilus influenzae.
b. Emphasize the importance of hand washing to prevent spread of infection.
c. Immunize adolescents and college freshman against Neisseria meningitides.
d. Encourage adolescents and young adults to avoid crowded areas in the winter.