Answer:
I believe it is D. All of the above.
Explanation:
I'm kinda into science yet I have no explanation, so sorry ;-;
This is A.Reality. Why, because most people experience this in there everyday lives and feeling lonely, discouraged or depressed isn't a Myth because some of us do experience it. Feeling down & hopeless still isn't a Myth because we (as I said above) experience this everyday. So the answer is A.Reality.
Hope I helped:-)
-Drey
The main cause is cooking