A) the Utah war was fought between the US and the Mormons
Answer: C. Grow the tree in a pot and measure the mass of the soil before and after the tree grows to a certain height
Explanation: When testing an hypothesis, which is a prediction of the outcome of an experiment, it is vital to keep all other factors, that can affect the outcome of the experiment, constant; so that any outcome can be attributed (or disregarded) to the variable being tested.
In this case, the variable being tested is the soil, and so all other factors such as water, air, sunlight, etc. should be kept constant.
Answer: The main goal of the US foreign policy during the presidency of Ronald Reagan (1981–1989) was winning the Cold War and the rollback of communism—which was achieved in the Revolutions of 1989 in Eastern Europe during 1989; in the German reunification in 1990; and in the Dissolution of the Soviet Union in 1991.
Explanation:
