Atherosclerosis is a condition in which substances such as fats and cholesterol are deposited on the inside walls of arteries, resulting in a decrease in the internal diameter of the arteries. This condition can sometimes occur due to a poor diet high in saturated fats. This directly interferes with the effectiveness of which two body systems?

a "theory" a suggestion that is not 100 % accurate, or a figure. some people say its a theory because they of all the passed theory's about one subject. it depends sometimes theory might be accurate and sometimes they are.

i think the answer would be a. after sentence 14! i hope i at least a little

unless you remeber everything you always have to have data when recording anything.