Look at the four squares,,and , which indicate where the following sentence could be added to the passage. Where would the sentence best fit? One of these structures is a kind of central processing unit that connects memory with physical functions. The limbic system of the brain integrates memory, emotion, and behavior. The system is composed of a group of related nervous system structures that are the functional center of emotions such as anger, fear, pleasure, and sadness. AThe components of the limbic system are linked to the cerebral cortex, the part of the brain involved in complex learning, reasoning, and personality.B The cerebral cortex makes decisions about the emotional content of these unique human qualities after 'consulting' the limbic system and other brain centers in processing and retrieving memories. CIt may, in turn, use memories to modify behavior.D