Two major effects of the Crusades were that the kings' authority increased and the Europeans learned about new things from the Muslims they encountered. During the Crusades, the kings increased taxes to fund the cause. Many peasants also left their land to fight, and when they died, the land went to the king. With large amounts of money and land coming in, the kings gained power.
Option A is the right answer that Free-market economies use prices to distribute goods, services, and resources.
In economics, a Free-market is an idealized system, where the prices for goods and services are determined by the open market forces( demand and supply). Therefore the government plays no role in price fixing in the open market competition. The most important and the basic feature of this type of economy is that only the people have the right to purchase goods and services with its adequate control over resources.
What was happening in 1850?
POP Culture: 1850
The September 18, 1850, Fugitive Slave Act provides for the return of slaves brought to free states. Millard Fillmore is sworn into office as the 13th President of the United States, following Zachary Taylor's death on July 9, 1850. "America" wins the first America's Cup yacht race on August 22, 1851.
Hoped that helped:)