Why were lewis and clark chosen to explore the louisiana purchase

The Lewis and Clark Expedition, also known as the Corps of Discovery Expedition, was the first American expedition to cross what is now the western portion of the United States. ... President Thomas Jefferson commissioned the expedition shortly after the Louisiana Purchase in 1803.

Because they had no family to be remembered by.

Iam a german monk and professor of theology. i believe that the catholic church's practice of buying forgiveness of sins through indulgences is wrong. i have translated the bible into german to make it easier for more people to be able to study it. i am here to stand by my writings and i refuse your demand that i recant them