Ihat are actions or behaviors that may have (or may not have ) taken place before someone dies?

I hate the actions or behaviors that my have (or may not have) taken pace before someone dies?

scientists have discovered that hiv does not cause aids by the virus's direct effect on the host's immune cells, but rather through the cells' lethal influence on one another. researchers from the gladstone institutes have revealed that hiv does not cause aids by the virus's

i believe it would cause an increase of percipitation, though i could be wrong. so i would say b is the answer.