The law of ordinance of 1785 was adopted by the U.S in order to put the 1784 resolution in motion by providing a good mechanism for selling and settling the land.
The 25th President of the United States was William McKinley.
McKinley serves from 1897 until his death by assassination in 1901.
McKinley was a Republican who supported America's new Imperial efforts. He was assassinated by Polish-American anarchist Leon Czolgosz and was succeeded as President by his Vice-President, Theodore Roosevelt.
Answer:
Option: B. They mark the beginning and ending of different periods.
Explanation:
Periodization tries to give weight to the way history is classified and organized through chronological periods. World history is enormous and dividing with each period differently to help historian and others to understand the past properly. Periodization is done to understand the period history with its political and other events during that particular period. They also help in telling the start and end of different periods.