Building the Panama Canal
The French in the 1880s had attempted to build a canal across Panama, this catastrophic failure, resulted in the deaths of over 22,000 individuals who were working on the canal project due to malaria and yellow fever. The French eventually stopped their attempt on the project in 1889.
The disease takes on this name because of the horrendous attack on the body that may lead to liver failure and result in a yellowish tone to the skin. The disease is a hemorrhagic fever which assaults the body causing a lengthy list of symptoms including vomiting, nausea, body aches, headaches, coughing up blood and possible resulting in death.
Colonial William Gorgas first let the charge in Cuba and then later in Panama to create a sanitation campaign, which laid waste to the habitats and breeding grounds for the mosquito carrying of the disease and discouraged other forms of contamination, such as isolating those who were sick in quarantine. With his successful program, the United States government was eventually able to complete the canal project in a 10 year period, at the beginning of the 10th century.
Manifest Destiny was first used by John O'Sullivan in an 1845 newspaper in New York.
The cause of the United States entering World War 1 in 1917 was because Germany sank their ship the Lusitania.
It protected the United States from competitors located in foreign countries.
The best answer is B.
The Warsaw pact is the name commonly given to the treaty between Albania, Bulgaria, Czechoslovakia, East Germany, Hungary, Poland, Romania and the Soviet Union which was signed in Poland in 1955 and was officially called The Treaty of friendship, Co-operation and Mutual Assistance. It was called the Warsaw pact because it was signed in Warsaw.
It was a response to the formation (by western allies) of the North Atlantic Treaty Organization (NATO). West Germany was allowed to join NATO and was allowed to re- militarize and thus the Soviets saw this as a potential threat.