The correct answer is a.conscious.
According to Freud's theory of the human mind, the mind consists of three distinct levels: the conscious, the preconscious and the unconscious. The conscious mind refers to part of the mind that we are in full awareness of at a given moment. The conscious mind includes thoughts, perceptions and feelings at a particular moment. For instance, as you are reading this answer, you are using your conscious mind to do so.
