Who led a group of religious pioneers west along the Mormon Trail in 1846? James Polk
Joseph Smith
Brigham Young
Jane D. Kellogg

Brigham Young

Explanation:

history is awsome :)

because its important to learn about other countries and how high tech they are compared to us. also its good to learn about other cultures and how ours differs and in common also we need to learn about companies that we still buy since they ship it here.

to replace ineffective because   andrew jackson's spoil system was a deliberate policy after he became president to remove federal employees he considered to be political opponents and replace them with his own supporters.