A. Hepatitis is a concern for individuals with HIV, but it is not specifically indicated by a low CD4-T-cell count. B. A CD4-T-cell count of 150/mm³ indicates severe immunosuppression, making the client highly susceptible to opportunistic infections like tuberculosis, which is common in individuals with HIV. C. While gonorrhea is a risk for sexually active individuals, it is not specifically related to the low CD4-T-cell count. D. Chlamydia is also a sexually transmitted infection, but similar to gonorrhea, it is not directly linked to the immunocompromised state indicated by the CD4-T-cell count.