What Do Projective Techniques and Self-Report Questionnaires Have in Common

What do projective techniques and self-report questionnaires have in common?

A) They both require verbal responses which are scored to obtain measures of personality characteristics.
B) The structure of the questions is intentionally ambiguous in both devices.
C) The structure of the responses is intentionally ambiguous in both devices.
D) Both devices might be classified as "weak testing situations" in which individual differences in personality strongly account for the differences in response among people.