While cliff jumping with friends one day, Chris struck his head on a rock beneath the water's surface, causing loss of consciousness and damage to the brain. As a result, he also experienced severe oxygen deprivation before he was pulled to the surface.

What type of brain injury was caused by the oxygen deprivation?

a) A traumatic brain injury

b) An Oxycortical brain injury

c) A Countercoup injury

d) A non-traumatic brain injury