The psychologist who would argue that the unconscious mind plays a key role in human behavior is Sigmund Freud and is therefore denoted as option C.
This was coined by the psychoanalyst which is referred to as Sigmund Freud and states that the behavior and personality arose as a result of interaction between the psychological forces which operate on the three levels of awareness and they are referred to as the following below:
He also proposed that the adult personality is made up of three aspects which include:
Though he didn't discover the unconscious aspect of the mind but he made it popular which is why it is used today when studying human behavior which is therefore the reason why Sigmund Freud was chosen as the most appropriate choice.
Read more about Sigmund Freud here https://brainly.com/question/6401105
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