Final answer:
The assessment that uses ambiguous stimuli to uncover personality traits is known as projective testing, with the Rorschach Inkblot Test being a notable example.
Step-by-step explanation:
The use of ambiguous, unstructured stimuli to assess personality is known as projective testing. This type of assessment is designed to reveal a person's unconscious feelings, impulses, and desires. Projective tests are less subject to intentional distortion since it's not clear what constitutes a 'good' answer, making it challenging for individuals to consciously sway their results. One of the most renowned forms of projective tests is the Rorschach Inkblot Test, along with others like the Thematic Apperception Test (TAT) and the Rotter Incomplete Sentence Blank (RISB). A correct response to the student's question would be b) Projective.