Which of the Following Sets of Statements Is True About

Which of the following sets of statements is true about the risk of developing cancer after a chemical exposure?

A) Chemicals are either carcinogenic or they are not, so if a person is exposed to a carcinogenic chemical, he will get cancer.
B) Chemical exposure much reach a certain threshold before causing cancer, so as long as people are not exposed to too much of a chemical, they will not get cancer.
C) Cancer risk is influenced by the dose of exposure, the duration, the route of exposure, and the frequency of exposure, so all of these factors contribute to a person's risk of developing cancer after an exposure.
D) Cancer is only caused by genetic factors, so chemical exposures are not important in the risk of developing cancer.