Researchers have concluded that there is a link between physical activity with the risk of heart attack and sudden cardiac death within one to two hours following the activity. a. episodic b. vigorous-intensity c. low-intensity d. frequent

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.