Carcinogen is: when cancer spreads. a substance that causes cancer. a term that means the same as an aneurysm. the chemicals used to stop the spread of cancer.

Andrew loves to go camping and hiking in the fall. about two weeks after his last camping trip, he noticed an expanding red, target shaped, rash on his arm. to avoid this illness, andrew should have select one: a. boiled his water before drinking. b. avoided contact with ticks. c. avoided contact with fleas found on mice. d. camped only in the spring.