Final answer:
The developmental theories of psychoanalytic theory, behaviorism, and cognitive theory are considered "grand" because they are comprehensive and overarching option (c).
Step-by-step explanation:
The developmental theories of psychoanalytic theory, behaviorism, and cognitive theory are considered "grand" because they are comprehensive and overarching option (c). These theories provide broad perspectives and attempt to explain fundamental questions about human development and behavior. For example, Sigmund Freud's psychoanalytic theory focuses on the stages of psychosexual development, while Jean Piaget's cognitive theory explains how children think and reason as they grow.
The "grand" nature of these theories lies in their attempts to explain diverse aspects of human development, incorporating psychological, behavioral, and cognitive dimensions. They offer overarching perspectives that address a wide range of phenomena, making them foundational in the field of developmental psychology.