Research on People's Consciousness of Their Own Thought Processes Has

Research on people's consciousness of their own thought processes has taught us that

A) Cognitive psychologists can confidently rely on people's introspections when studying higher thought processes.
B) Cognitive psychologists should not rely on people's introspections when studying higher thought processes.
C) Cognitive psychologists can rely on people's introspections about their attentional processes but not about their complex decision processes.
D) The behaviorists were correct in assuming that cognition cannot be studied objectively.