Final answer:
The reference materials do not provide information about the first African American chiropractor to graduate from Palmer in 1956, so the question cannot be answered based on the provided information.
Step-by-step explanation:
The correct answer to the question of who was the first African American chiropractor to graduate from Palmer in 1956 is not provided in the given reference materials. The reference materials do not mention Palmer College of Chiropractic or any individuals associated with it. They focus on other historical figures in the field of medicine, such as Robert Tanner Freeman, the first African American to graduate with a doctorate in dental surgery, and James McCune Smith, the first African American to earn a formal medical degree. The materials also highlight the achievements of other notable African American medical professionals like Dr. Solomon Carter Fuller and Dr. Charles Drew.