The Significance of the Discovery of Einkorn at Mureybit and Abu

The significance of the discovery of einkorn at Mureybit and Abu Hureyra in Syria rests in the fact that:

A) chemical analysis of the kernels indicates that the wheat was domesticated
B) this shows that corn (maize) was not restricted to the Americas in prehistory
C) these sites are located outside of the region where wild wheat grows today, indicating that the plants may have been moved by people
D) though einkorn cannot be eaten by people, it is valuable food for sheep; its presence at the site implies that people were tending and feeding wild sheep, a step along the continuum leading to their domestication