Malcolm Had Been a Professional Hockey Player with a Great

Multiple Choice

Malcolm had been a professional hockey player with a great sense of his position in space. Even after retiring from professional hockey Malcom continued to play in seniors' hockey leagues. During one of those seniors games, John (a player on the opposite team) knocked Malcolm to the ice and Malcolm hit his head hard enough to acquire brain damage. After the accident, John developed an enormous amount of guilt, which prompted him to enrol in Introduction to Psychology to learn more about brain function and neuroscience.
-John is trying to make Malcolm feel better.John tells Malcolm that he will soon be back to normal because brains are plastic and neurogenesis will eventually take place.Is John correct

A) No, neurogenesis never happens to adult humans.
B) No, plasticity is not unlimited and the brain's plasticity declines with age.
C) Yes, neural wiring in the brain is flexible and constantly evolving.
D) Yes, stem cells exist in the adult brain, so neurogenesis is unlimited.