According to the Mid-Nineteenth-Century Physicians and Racial Theorists Josiah Nott

According to the mid-nineteenth-century physicians and racial theorists Josiah Nott and George Gliddon:

A) there were no separate species of races.
B) blacks and chimpanzees were the same.
C) skull sizes were the same for all races, but intelligence differed.
D) there was a hierarchy of races, with blacks forming a separate species between whites and chimpanzees.
E) there was not yet enough scientific data to prove either the southern or the abolitionist points of view.