I would say C, schizophrenia,
because schizophrenia is "a mental disorder that in many ways centers around not recognizing what is part of reality – namely, having psychotic breakdowns." It is not related to anxiety, as anxiety is classified as "neurotic" while schizophrenia is classified as "psychotic".
No, all you need to solve a rubiks cube is patience, common sense, and courage that you know you can do it. anyone can do it!
Physical fitness is really good
