Watson Found Pavlov's Conditioned Reflex Concept Useful in His Own

Watson found Pavlov's conditioned reflex concept useful in his own work because it

A) was a properly objective general technique that he could apply to many other learning situations besides the salivary reflex.
B) explained a great deal about the nature of the brain.
C) showed the value of precise measurements in psychological experiments.
D) disproved the validity of Freudian concepts.