In Julian Rotter's Research on Locus of Control, What Did

In Julian Rotter's research on locus of control, what did his study identify as the relationship between locus of control and health?

A) Internals are in better health throughout their life.
B) Externals are more willing to take responsibility for their health.
C) Externals are more compliant with their doctor's orders.
D) Internals have more difficulty stopping smoking.