Zane may be diagnosed with major depressive disorder.
When a person is depressed, they are feeling low all the time. They are not really interested in anything, and spend a lot of time sleeping because they don't see a point in doing anything else. This is what Zane is experiencing due to his depression.
C is the answer
:) for your question (im writing extra cause answer is too small)
The Republic of Korea. (Check my source of the World Cancer Research Fund first.)
