Tricyclic medications such as elavil work because they
a) increase the level of norepinephrine and decrease the level of serotonin
b) decrease the level of norepinephrine and increase the level of serotonin
c) decrease the level of norepinephrine and serotonin
d) increase the level of norepinephrine and serotonin

increase the level of norepinephrine and serotonin

Explanation:

well, i can't read it so i'll ask you questions about it : )

if you were a reader and you read the introduction, would you want to read more?

does it start with a question? if so, is it something you would want to read about?

and ask any friends or family for their opinion : )