A. The president makes the economic decisions in a command economy.
A command economy is an economy where government officials, headed by the president, make most of the decisions.
The government owns some or all of the industries producing goods and services. They decide on what goods to produce and its corresponding prices, as well as, how to distribute the goods.
Under this economy, mass unemployment is avoided, abuse of monopoly power is prevented, and produced goods will benefit society and enable everyone to have access to their basic necessities.
The dutch did not help spread Christianity to the east
there were 125,000 African Americans who were overseas in World War II.
The type of wave which needs a medium to travel are sound waves because they travel by oscillating electromagnetic fields
<h3>What is a Sound Wave?</h3>
This refers to the waves of refraction which is propagated by a plastic medium.
With this in mind, we can see that mechanical waves are the types of wave that needs a medium for propagation and a sound wave is an example of a mechanical wave because it travels by oscillating electromagnetic fields.
Read more about mechanical waves here:
brainly.com/question/9242091
