Answer:
a. the MMPI
Explanation:
The MMPI stands for Minnesota Multiphasic Personality Inventory.
The MMPI is mainly intended to test individuals who are doubted or suspected to suffer from mental health issues or some other clinical issues. It is the psychological test which assesses the personality traits as well as psychopathology.
The MMPI was designed by the University of Minnesota to determine the personality structure of humans.
In the context, Dr. Zytowics who wishes to test his client suffering from social withdrawal, depression and other personality and social disorder may use the MMPI to test his client.
Hence the correct option is (a).