After the popularity of common sense, the was designated to write an initial draft for independence.

After the popularity of Common Sense, Thomas Jefferson was designated to write an initial draft for independence.

Explanation:

The Second Continental Congress commissioned three of its members to write a Declaration of Independence: Benjamin Franklin, John Adams and Thomas Jefferson. The Declaration of Independence was largely authored by Jefferson, the future third president. Jefferson was inspired by the English philosopher and social critic John Locke and some parts are almost literally Locke's own words. John Adams made some comments, but the biggest changes were made by the Continental Congress itself, which removed two-thirds of the arguments for independence, namely those in which Jefferson attacked the English Parliament and the English people.

by creating a labor shortage that pushed the continent toward a market economy

the answer to your question is a. the salt plains

in 1811, he led an expedition, known as the george c. sibley expedition, to improve relations with the pawnee and kansa tribes, and also to locate the rumored jefferson's salt mountain