Which of the following statements is true?
1) Neanderthal brains developed the same as Homo sapien brains.
2) Neanderthals were cognitively adept, although their specific abilities likely differed from modern humans.
3) There is extensive evidence indicating that Neanderthals had limb symmetry (were right- or left-handed).
4) A and B
5) B and C
6) A and C
7) All of the above