Answer a, b, and c. briefly explain which one of the following options most clearly marks the closing of the american frontier. homestead act (1862) transcontinental railroad (1869) dawes act (1887) the battle of wounded knee (1890) provide an example of an event or development to support your explanation. briefly explain why one of the other options is not as useful to mark the closing of the frontier.

The Battle of Wounded Knee (1890) clearly marks the closing of the American Frontier.

It was this year, 1890, when the Census Bureau declared the American Frontier closed because all the land within the United States were claimed. 

The Homestead Act (1862) offered public lands to anyone who settles in the land for a minimum of 5 years. This lead to the surge of American and immigrants moving to territories that have long been occupied by the Native Americans. 

The transcontinental railroad (1869) made it possible for people and goods to be transported and traded to other places. 

Where's the essay dude?