The most widely used self-report personality test used today is

A) the Rorschach Inkblot Technique.
B) the MMPI.
C) the Myers-Briggs Indicator.
D) the Thematic Apperception Test.

The MMPI (Minnesota Multiphasic Personality Inventory) is the most widely used self-report personality test in use today. It consists of 567 true-false questions that assess various aspects of an individual's personality and mental health. The test has been extensively researched and validated, and is commonly used in a variety of settings, including clinical, forensic, and employment contexts. The other options listed (Rorschach Inkblot Technique, Myers-Briggs Indicator, and Thematic Apperception Test) are less commonly used and/or have less empirical support.