Which accurately describes the relationship between cancer risk and exposure to mutagens? Cancer risk decreases when a person is exposed to mutagens because the risk of DNA mutation decreases as well. Cancer risk increases when a person is exposed to mutagens because the risk of DNA mutations increases as well. Cancer risk increases when a person is exposed to mutagens because the risk of DNA mutations decreases considerably. Cancer risk decreases when a person is exposed to mutagens because the risk of DNA mutations increases considerably.