John has been having difficulties getting out of bed, is not interested in going out with friends, and does not even answer the phone. He has let a number of bills go unpaid, he is sleeping 12 to 14 hours a day, and he cannot concentrate at work. He has called in sick to work at least once each week. John is MOST likely suffering from disorder.

dissociative disorder.

Explanation:Dissociative disorders (DD) are conditions that involve disruptions or breakdowns of memory, awareness, identity, or perception. People with dissociative disorders use dissociation as a defense mechanism, pathologically and involuntarily.

Dissociative symptoms can potentially disrupt every area of mental functioning. Examples of dissociative symptoms include the experience of detachment or feeling as if one is outside one's body, and loss of memory or amnesia. ... Dissociative identity disorder. Dissociative amnesia. Depersonalization/derealization disorder.

answer; i believe that the correct answer is ; the eastern and western churches spoke different languages;

the branch of biology that deals with the normal functions of living organisms and their parts.

the way in which a living organism or bodily part functions.