Which new kind of energy changed transportation and industry in america during the early to mid-1800s?

What effect did john hay’s open door policy letters have on the imperial powers of britain, france, germany, russia, and japan? a. it provoked the imperial powers to declare war on the united states. b. it caused the imperial powers to restrict trade in their trade with china. c. it warned the imperial powers that the united states would soon declare war on china. d. it signaled to those powers that the united states would take a larger role in world affairs than before.

What is the most necessary information that happened in the titanic movie

President eisenhowers foreign policy stressed peace, threatened massive retaliation for attacks and what