After the revolution, both britain and spain a. tried to gain control of florida b. did their best to win the friendship of america c. prevented america from exercising effective control over about half of its total territory d. america to fight the pirates of north africa

The correct answer is C. After the Revolution, both Britain and Spain prevented America from exercising effective control over about half of its total territory

Explanation:

After independence from the United States, the young nation had conflicts with Spain and Great Britain. At that time, both nations were European powers, which had colonial territories in North America.

Spain had territories in Florida and Louisiana, through which it constantly violated border limits, exercising sovereignty over American territories. For example, on several occasions it tried to establish dependencies east of the Mississippi River.

For its part, Great Britain controlled the entire area of Canada and the territories west of the Mississippi that were not part of Spanish Louisiana. In their case, they also made raids, but through the allied native tribes, who dedicated themselves to devastating the American populations near the border.

a. poison gas was sprayed over battlefields by airplanes to weaken enemy positions before major attacks.