Barry just found out his HIV test is positive. Which of the following statements is true? :
a. Barry's positive HIV test means he has AIDS.
b. Looking back, Barry knows exactly when he got infected with HIV because the initial symptoms are markedly different than other STIs.
c. Barry should seek treatment as soon as possible to slow progression of the disease.
d. Fortunately Barry's wife does not need to worry about getting infected since she is a heterosexual female.