Answer
d.
Work Step by Step
The brain cases of Neanderthals were lower and longer than those of modern humans; however, the brains of Neanderthals appeared to be as large or even larger than those of modern humans.
Analysis of Neanderthal skeletons revealed that they were not as tall as modern humans. The Neanderthal's short and stocky body structure resembled that of modern-day humans living near the Arctic; this type of body favored heat conservation.