Final answer:
The type of early psychologist who believed that "the whole is more than the sum of its parts" is A) Gestalt.
Step-by-step explanation:
Gestalt psychology is based on the idea that the brain creates perceptions that are greater than the sum of sensory inputs. This perspective focuses on how sensory information is organized into meaningful wholes and emphasizes the importance of context and the relationships between elements.
Unlike the structuralists who broke down mental processes into individual components, the Gestalt psychologists believed that understanding perception required examining the whole picture and how different elements interact. Therefore the correct answer is A) Gestalt.