I believe the answer is the first one
Answer:
George Washington established precedents for the executive office that have since become customary practice. Washington is responsible for establishing the tradition of the inaugural address and the cabinet system, neither prescribed by the Constitution.
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AT&T held a monopoly in the US and Canada, throughout most of the 20th century. AT&T was the owner of the Bell System, a network of telecommunications companies which included Western Union Telegraph. For many years the slogan of the company was "One Policy, One System, Universal Service."
However antitrust regulators were not happy with AT&T and in 1974, the United States Justice Department opened a case against the company, arguing they were violating the antitrust law. This case was settled in 1982, and the company was order to break up. Hence AT&T was divided into seven Regional Bell Operating Companies.
The Dust Bowl, which happened during the 1930´s originated in the South and its devastation and effects moved on to affect not just the Southern Plains but also the Great Plains. The absence of rainfall, the intense movement of strong winds and continuous dust were part of the factors that affected everything in life, from the economy of families to their welfare and even comfort, to their health. It was a time of great drought, which coupled with the Depression of the 1930s, increased the poverty levels, especially in rural areas. In response to the need for food and income to be generated, many farmers decided to replace the natural grasses that grew in the plains for winter wheat and this action, coupled with the lack of rainfall, led to a furthering of the drought problem and also to land erosion. In the end, it was very difficult, if not almost impossible, to grow any crops and the lands turned to dust. This is why the correct response is C: Replacing natural grasses to plant winter wheat led to topsoil erosion.