It Has Been Suggested That the Taro Remains Found at the Kuk

It has been suggested that the taro remains found at the Kuk Swamp site are indicative of tending or even early domestication because:

A) Kuk Swamp is located in the highlands, some distance away from the natural range of wild taro
B) the phytoliths were much different from than those of the wild plant
C) the taro seed impressions found on clay pots indicate a size much larger than of the wild plant
D) all of the above