John Watson's studies of rats running through mazes demonstrated that rats had learned to use their to navigate. A. automatic set of motor habits B. whiskers C. vision and hearing D. sense of smell

The correct answer is letter A

Rat labyrinths concluded that the only important factors in the formation of learned associations were kinesthetic impressions, combined with certain other intra-organic impressions. That is, the animals were learning to associate sequences of muscle movements to the turns of the labyrinth.

Kinesthetic sense  allows the perception of movement or rest of the body. It provides information about the relative positions of the limbs and other parts of the body during movements and about muscle tensions.

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the correct answer is a