The cooperative system is the entities that have a common objective and goals.
<h3>What is a cooperative system?</h3>
This is a system that exists due to the fact that multiple groups have a common goal.
The cooperative system is one that the people share information within themselves in order to achieve a goal that is common to all.
Read more on cooperative systems here: brainly.com/question/8007306
The answer is A,B,D are all the correct answers because E is backwards
the answer to your question is a) they had advanced planning and developed effective military methods.
Answer:it’s b. Edwards Plateau
Explanation: