Archaeologists excavating a Neanderthal campsite found discarded gazelle teeth there whose coloration indicated that gazelles had been hunted throughout the year. The archaeologists concluded that the Neanderthals had inhabited the campsite year-round and thus were not nomadic. In contrast, the archaeologists cite a neighboring campsite of nomadic Cro-Magnons that contained teeth from gazelles all killed during the same season. Which one of the following, if true, most seriously weakens the archaeologists' reasoning?
A: Cro-Magnons usually followed the migrations of the animals they hunted.
B: Cro-Magnons and Neanderthals sometimes exchanged tools.
C: Neanderthals saved gazelle teeth for use in religious rituals and later discarded them.
D: Gazelles inhabited the area around the campsites year-round.
Choose A, B, C or D as your solution.
C