Which of these was the most important outcome of the war with mexico in the 1840's?

When early settlers began to move north, they moved north of the 49th parallel. puget sound. seattle. the columbia river.

What directive in source a might have been at the root of the action described in source b?

List three reasons why explorers began to explore new, and old areas. [[ps: doesn't explicitly say where. i think it's more in general.