In economics there are four different types of market structures. They are as followed:
1) Perfect competition- This allows for businesses to compete against each other for consumers.
2) Monopoly- This is when one business or corporation corners a market. This occurs when a business is the only supplier of a good/service.
3) Oligopoly- This is when a small amount of businesses control a market/product.
4) Imperfect competition
In your question then, the correct answers are : Monopoly, perfect competition, and oligopoly.
The setting-up of a base at Guantanamo Bay. This happened after the war. The U.S. obtain Guam, the Philippines and
Puerto Rico from the Spanish. They did
not acquire Cuba but kept a lease on Guantanamo Bay. This was America’s entry into Imperialism.
B. Sea life. This is because all of the other three options are very publicized, but sea life is not.
Answer:The Transportation Security Administration (TSA)
The Transportation Security Administration (TSA) was created in the wake of 9/11 to strengthen the security of the nation's transportation systems while ensuring the freedom of movement for people and commerce
Explanation:please give brainliest
