Which of the Following Is One of the Reasons Why

Which of the following is one of the reasons why solitary confinement is considered such a harsh punishment for prisoners?

A) Interacting only with people for whom we have no real feelings is unrewarding.
B) Most of us aren't satisfied if we have emotionally close relationships with people we don't get to see.
C) Being cut off from social interaction can be physically and psychologically devastating.
D) We develop many of our important relationships in face-to-face contexts.