Carl Gustav Jung was a Swiss psychiatrist and psychoanalyst and founded analytical psychology and had fundamental differences with Sigmund Freud who once mentored him.

Which revision BEST improves the syntax of the sentence?

Responses
A As a Swiss psychiatrist and psychoanalyst, analytical psychology was what Carl Gustav Jung founded and he had fundamental differences with Sigmund Freud who once mentored him.As a Swiss psychiatrist and psychoanalyst, analytical psychology was what Carl Gustav Jung founded and he had fundamental differences with Sigmund Freud who once mentored him.
B A Swiss psychiatrist and psychoanalyst, Carl Gustav Jung founded analytical psychology and had fundamental differences with his once mentor Sigmund Freud. A Swiss psychiatrist and psychoanalyst, Carl Gustav Jung founded analytical psychology and had fundamental differences with his once mentor Sigmund Freud.
C Funder of analytical psychology, Carl Gustav Jung was a Swiss psychiatrist and psychoanalyst and he had fundamental differences with Sigmund Freud who once mentored him. Funder of analytical psychology, Carl Gustav Jung was a Swiss psychiatrist and psychoanalyst and he had fundamental differences with Sigmund Freud who once mentored him.
D Carl Gustav Jung, a Swiss psychiatrist and psychoanalyst, founded analytical psychology and had fundamental differences with his once mentor Sigmund Freud.

D Carl Gustav Jung, a Swiss psychiatrist and psychoanalyst, founded analytical psychology and had fundamental differences with his once mentor Sigmund Freud.