How Does the Case of Angelman Syndrome Demonstrate a Genetic

How does the case of Angelman syndrome demonstrate a genetic influence on personality?

A) People with Angelman syndrome usually develop hostile personalities later in life.
B) People with Angelman syndrome are almost always happy and cheerful.
C) People with Angelman syndrome are usually depressed and have an inactive temperament.
D) People with Angelman syndrome have a very flat affect, demonstrating very little personality.
E) People with Angelman syndrome tend to develop bipolar disorder.