The correct answer is D. Commercial industry.
Explanation
A production system is a term to refer to a set of operations that allow the manufacture of an object or the provision of a service. In general, companies have a production system to become more efficient and provide the best service to their users, an example of this is the commercial industry that is characterized by focusing on mass production to constantly supply the demand of its goods and thus earn money, this is because when it is produced in mass, everything is usually cheaper this includes labor, materials and the use of machinery. So, the correct answer is D. Commercial Industry.
Answer:
LIke if helped
Explanation:
One of the reasons for the rapid and peaceful spread of Islam was the purity of its doctrine - Islam calls for faith in only one God. This, coupled with the Islamic concepts of equality, justice and freedom, resulted in a united and peaceful community. People were free to travel from Spain to China without fear, and without crossing any borders.
It has changed dramatically. The US economy has been on an upward trajectory for the past 50 years due to economic expansion and the way the country is being run. While there were downfalls in certain phases, the general trajectory has been positive.
ANSWER: A. By questioning whether their sources are reliable.
EXPLANATION: Early historians used unreliable sources to write history. They had to believe mainly on sources which were believed by people. Modern day historians has many instruments and theories to prove an incident of history. Scientific advancements has helped calculate the accuracy of any event. Carbon dating is one of the many scientific advancements helping modern day historians. This test helps them to find out the age of any fossil found, thus giving an accuracy and reliability of the sources which will be documented.
