TOEFL Listening: TPO-TOEFL听力TPO - G318DXTX15718R7TR$

Why does the professor mention the area where the optic nerve connects to the back of the eye? A. To explain why many people do not understand the concept of blind spots B. To illustrate how visual blind spots interfere with the processing of written words C. To explain the origin of a concept that is used in the study of cognition D. To show how visual perception works