Professor Lutz Is Conducting Twin Studies of Generalized Anxiety Disorder

Multiple Choice

Professor Lutz is conducting twin studies of generalized anxiety disorder (GAD) .What is he most likely to find in terms of genetic influences for GAD?

A) He is most likely to find a strong genetic influence.
B) He is most likely to find a modest genetic influence.
C) He is most likely to find an insignificant genetic influence.
D) He is most likely to find no genetic influence.