A split-brain person watches as a picture is flashed in the left visual field. When asked, "Was it a round object?" he replies, "Yes. I mean no," when "no" is the correct answer. The patient gets the correct answer from:

a. information passed from the right hemisphere through a few regenerated axons.
*b. changes in facial expression controlled by the right hemisphere.
c. changes in blood flow to the left hemisphere.
d. axons that connect the speech areas directly to the right visual cortex.