What did the United States promise when it adopted the Truman Doctrine in 1947? Check all that apply. to defend any country resisting communism
to stay out of conflicts involving communism
to pay any country fighting against communism
to encourage countries to adopt democracy
to defend any country resisting democracy

president thomas jefferson commissioned the expedition shortly after the louisiana purchase in 1803 to explore and to map the newly acquired territory, to find a practical route across the western half of the continent, and to establish an american presence in this territory before britain and other european powers

porter is writing economic history because he is focusing on the cost of developing vaccines.

i believe the answer to your question is b. pay your bills early