I would say the answer is C.
Opportunistic infections (OIs) are infections that occur more frequently and are more severe in individuals with weakened immune systems, including people with HIV. People are at greatest risk for OIs when their CD4 count falls below 200, but you can get some OIs when your CD4 count is below 500.
Weightlifting builds many muscles which would restrict movement
yoga has many positions which keep you flexible
basketball is mainly running and jumping which don't keep you flexible
running only works the legs
so your answer is B. yoga
