Which of the following statements about African American soldiers in the Civil War is NOT correct?

Select the best answer from the choices provided.
A.
African Americans died in higher percentages than white soldiers from both combat and illness.
B.
African Americans were rarely allowed to become officers and were rarely promoted.
C.
African American soldiers were awarded the Butler Medal but not allowed to receive the Medal of Honor.
D.
African American soldiers fought in more than 400 combat engagements in the Civil War.