What did study of the Rosetta Stone allow people to do?

In the 19th century, the Rosetta Stone helped scholars at long last crack the code of hieroglyphics, the ancient Egyptian writing system. ... Ultimately, it was French linguist Jean-Francois Champollion who deciphered the Rosetta Stone and cracked the hieroglyphic code.

Explanation:

The Lewis and Clark Expedition (1804–1806) was a federally funded venture to explore the North American West. The expedition's principal objective was to survey the Missouri and Columbia rivers, locating routes that would connect the continental interior to the Pacific Ocean. Hope this helps!