Answer: Suffered a change in personality.
Explanation: Of all the options given, the most probable option that can be deduced from the question is a change in Personality.
A change in Personality can be defined as a significant and dramatic change in appearance, feelings, opinions etc.
Phineas Gage suffered a prefrontal cortex damage which is associated with a variety of complex behaviors, including planning, and greatly contributes to personality development.
As a result, his personality was changed SIGNIFICANTLY.