If the research results showed that concomitant HIV-2 infection can inhibit HIV-1 disease progression, the best title of the paper would be （）.
A.inhibition of HIV-1 disease progression by concomitant HIV-2 infection
B.effects of concomitant HIV-2 infection on HIV-1 disease progression
C.relationship between concomitant HIV-2 infection and HIV-1 disease progression
D./
正确答案：effects of concomitant HIV-2 infection on HIV-1 disease progression