D.,
A, B, and C have the solution of the system of Equations (2,1) But D has a solution of (1,2).
George Washington was the most responsible for keeping the colonial army together.
Answer:
can the answer be more than one? id say both b and d.
Explanation:
by domesticating them, they were able to easily get milk and such from the animal without killing it yet or it foghting back. and also the example of domesticated dogs used to herd sheep. Maybe its just d if it can only be one but id say both b and d