I believe the answer is "British Empire"
The yellow fever mosquito, Aedes aegypti<span> (Linnaeus)
This has been a nuisance species in the United States for centuries. Originating in Africa, it was most likely brought to the new world on ships used for European exploration and colonization (Nelson 1986). As the common name suggests, </span>Aedes aegypti<span> is the primary vector of yellow fever, a disease that is prevalent in tropical South America and Africa, and often emerges in temperate regions during summer months. During the Spanish-American War, U.S. troops suffered more casualties from yellow fever transmitted by </span>Aedes aegypti<span> than from enemy fire (Tabachnick 1991).</span>
Answer:A
Explanation:The answer is A because it prevented the expansion of communism.It was president Harry.S.Truman that introduced it in 1947 to reduce the spread of communism.This policy of containment is also known as Truman doctrine and this policy was successful in korea,they successfully prevented communism.
