The main idea of this act is to stop terrorism against the us.

It's the Patriot Act

Explanation:

To prevent future terrorist attacks

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

d. the right to establish a one-house legislature