The diagram below shows the cause-and-effect relationship between two events: What should replace the question mark in the EFFECT bubble?

Europe's economy entered a long slump.
The Soviet Union benefited from the Marshall Plan.
The Soviet Union and its allies created the Warsaw Pact.
The Soviet Union formed an alliance with Germany and Japan.

In 1924, J.E. Hoover was appointed by the US Congress as the first chief of the Bureau of Investigation of the US, the predecessor of the FBI that was oficially founded in 1935. He continued as director during 37 years until his death.

He is a controversial figure. On one hand, he managed to construct and administer a huge crime-figthing agency with modernized police mechanisms. On the other hand, some evidence has been collected over the years that proves that at some points he exceeded the functions he was supposed to perform, exercising an unlimited control from his intimidating position, that reached even the figure of the President.

The correct answer to this open question is the following.

Hoover helped to push the Pollution Act through Congress in 1924, the first of its kind.

Herbert Hoover was the Secretary of Commerce during President's Calvin Coolidge administration. However, his personality and political presence exerted influence in other US political decisions. Hoover impulsed and supported the Pollution Act through Congress in 1924. He was known to be a good environmetalist, as he was the President of the National Parks Association. He also welcomed the idea of the radio as a mass media of communication.

Women primarily worked in service industries they continued through the 1930's and they also worked as Clerical workers, teachers, nurses, telephone operators, and domestics largely found work. Children suffered through it all. ... Since children lacked food, they often suffered from no having enough nutriton.  Men started to not have jobs to support there families, It got to the point where they had to rely on there wives or children

The Declaration of Independence is defined as the formal statement written by Thomas Jefferson declaring the freedom of the thirteen American colonies from Great Britain. An example of the Declaration of Independence was the document adopted at the Second Continental Congress on July 4th, 1776.

The Declaration of the Rights of Man and of the Citizen (French: La Déclaration des droits de l'Homme et du citoyen) is one of the most important papers of the French Revolution. This paper explains a list of rights, such as freedom of religion, freedom of speech, freedom of assembly and separation of powers.

The answer is C. Hope it helps 8D!