What should be changed to make the following sentence true? Sigmund Freud believed that understanding the unconscious mind was critical to understand subconscious behavior.

A. The name "Sigmund Freud" should be changed to "Wilhelm Wundt."

B. The word "subconscious" should be changed to the word "conscious."

C. The word "unconscious" to the word "conscious."

D. The word "understand" should be changed to the word "believing."

B.

Explanation:

Sigmund Freud's work was based on the study of the unconscious mind using hypnosis methods.

Why hypnosis? Because through this technique he was able to enter in the unconscious mind and study it to one purpose: explain conscious behaviour.

This method he applied to 'cure' neurosis, he believed that neurosis (a conscious behaviour) was determined and caused by actions happened in the past, most of it at first ages of life.

The answer is

B. The word "subconscious" should be changed to the word "conscious."