By gaining possessions and influence in asia and the americas during the spanish-american war, the united a. threatened british power around the world. b. forced china and japan to open their ports to trade. c. spain keep its power in europe. d. became a worldwide power with an extended empire.

The correct answer here is D.

The Spanish-American War can bee seen as a turning point in the American history as it, along with the territorial and political expansion that followed, made the United States a world power that could stand in the same arena as the other, older world powers such as Spain and the United Kingdom. This marked the beginning of the US involvement with the world affairs.

I think the correct answer from the choices listed above is option D. By gaining possessions and influence in Asia and the Americas during the Spanish-American War, the United States became a worldwide power with an extended empire. Hope this answers the question.