Which notable individual is the subject of a case study showing the importance of the frontal lobe in decision making?

A) H.M.
B) P.F.
C) Christopher Reeve
D) Phineas Gage

Phineas Gage is a famous case study in neuroscience and psychology, illustrating the role of the frontal lobe in personality, decision making, and social behavior. After surviving a severe brain injury in which a large iron rod was driven completely through his head, damaging much of his frontal lobe, Gage's personality was said to have changed dramatically, providing early evidence of the brain's role in determining personality and social behavior.