First of all... what period? because if you are talking about this time, I think it is becaise they want to feel powerful to be able to have more allied countries in any situation, they also do it because they want to control most of the world natural sources that other countries have.
It's a very long sentence with a lot of information, but it is still only a simple sentence (option b): it has only one verb (taught). In order to qualify as a complex or compound-complex sentence, it would have to have at least 2 phrases, each with a different verb.
Hopes this helps:
Answer: General Longstreet.
American General-Eisenhower
British General-Montgomery
Answer:
The Marshall Court established the legal authority of the Supreme Court over the states and other branches of the federal government.
Explanation:
