The agent (mixture) is carcinogenic to humans. The
exposure circumstance entails exposures that are
carcinogenic to humans. This category is used when
there is sufficient evidence of carcinogenicity in
humans. Exceptionally, an agent (mixture) may be
placed in this category when evidence of
carcinogenicity in humans is less than sufficient
but there is sufficient evidence of carcinogenicity
in experimental animals and strong evidence in
exposed humans that the agent (mixture) acts through
a relevant mechanism of carcinogenicity.