In the Study Mentioned in the Textbook, Rats with Spinal

In the study mentioned in the textbook, rats with spinal cord damage implanted with embryonic stem cells showed ___________.

A) improvements in the damaged areas in the spinal cord.
B) no improvements in the damaged areas in the spinal cord.
C) no improvements in other paralyzed areas of the body.
D) improvements in the damaged area of the spinal cord and the paralyzed areas of the body.