While researching a topic, a student has taken the following notes:
• In 2013, archaeologists studied cat bone fragments they had found in the ruins of Quanhucun, a Chinese farming village.
• The fragments were estimated to be 5,300 years old.
• A chemical analysis of the fragments revealed that the cats had consumed large amounts of grain.
• The grain consumption is evidence that the Quanhucun cats may have been domesticated.