Disease-causing microbes have a negative impact on the body.
Water was tested for the presence of disease-causing microbes.
Water that is not tested can have a negative impact on the body.
Water that is not what can have a negative impact on the body?
(a) salinity
(b) chemicals
(c) sweat
(d) an object
(e) tested
(f) deadly
(g) dangerous
(h) dead