So I did Computers, medicine and Auto Mobiles. I need two more to finish the five advances in the 20th century that are important. can you guys help me?

The Airplane

The Automobile

Rocketry

The Submarine

Antibiotics

Television

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

answer; /// i do believe that the correct answer is (a); a farming tribe that settled primarily along the mississippi and arkansas rivers;