Part a: which of the following identifies the main idea of the text? a scientists have been unable to provide evidence of a a link between isolation and brain development. b while some prisoners react negatively to solitary confinement, the process is necessary for their protection and the protection of others. c solitary confinement is an appropriate response to violent or dangerous criminals, as it is intended to punish prisoners for their actions. d the damage that solitary confinement is speculated to have on mental processes makes it an inappropriate form of punishment for anyone.