The answer is: C. become aware of their repressed conflicts and impulses
Psychoanalytic techniques refers to the use of ambiguous tests or activities in order to develop an understanding to the patients' behavior or way of thinking.
If the tests are not ambiguous, the patients could understand how it's scored and might alter the results in order to be seen in positive light. But, if the test is ambiguous ( such as ink blot or parapraxes) it is very hard for them to alter the result and the psychiatrist can become aware of their repressed conflicts and impulses.