What happened when Thompson temporarily inactivated the red nucleus during learning?

a. The rabbit showed no responses during training but showed evidence of learning as soon as the red nucleus recovered.

b. The rabbit showed no responses during training, and after the red nucleus recovered, the rabbit learned at the same pace as a rabbit with no previous training.

c. The rabbit showed no evidence of learning during training and no ability to learn even after the red nucleus recovered.

d. The rabbit showed normal responses during training but forgot them after the red nucleus recovered.