Step 1: Understanding the Concept:
The question asks to identify the proponent of the "Insight theory of aggression." It's important to analyze what each listed psychologist is known for in the context of aggression.
Step 2: Detailed Explanation:
Insight Learning Theory: The concept of "insight" in psychology is most famously associated with Wolfgang Köhler's experiments with chimpanzees, which demonstrated sudden problem-solving. This is known as the "Insight Learning Theory," and it relates to cognition and problem-solving, not aggression.
Theories of Aggression:
(A) Sigmund Freud proposed an instinct theory of aggression, suggesting that aggression stems from an innate death instinct (Thanatos).
(B) John Dollard (along with Neal Miller) proposed the Frustration-Aggression Hypothesis, which posits that aggression is always a consequence of frustration.
(C) Albert Bandura proposed the Social Learning Theory of aggression, arguing that aggression is learned through observation and imitation (modelling).
There is no prominent psychological theory known as the "Insight theory of aggression." The term appears to be a conflation of Köhler's learning theory with the topic of aggression.
Step 3: Final Answer:
None of the listed psychologists, nor any other major psychologist, is credited with an "Insight theory of aggression." Therefore, the correct option is "None of them".