Which of the following statements about AIDS is TRUE?
a.An infected person immediately develops AIDS -related complex (ARC)
b.The median time for the development of full-blown AIDS is around 15 to 20 years
c.The death rates from AIDS from 2002 to 2010 declined by at least 50% in the United States
d.Highly active antiviral therapy (HAART) treats symptoms of AIDS but does not affect the virus.