Because humans do not have fur, goose bumps are not useful in maintaining body temperature. What does the existence of unused structures, such as goose bumps, suggest about the ancestry of humans? A. Humans evolved from chipanzees, who have muscles in their skin that raise their fur when external temperatures fall

B. goose bumps may help humans survive as conditions on earth change

C. humans evolved from an earlier species that likely had fur on hair which was important to the survival of the earlier species

D. Humans in the 18th century needed goose bumps to stay warm ​