From its earliest years, the Senate has jealously guarded its power to review and approve or reject presidential appointees to executive and judicial branch posts. In its history, the Senate has confirmed 126 Supreme Court nominations and well over 500 Cabinet nominations.
Answer:
B. It represents the main route for settlers moving into the Oregon Territory.
Explanation:
i believe that B is your best answer, as it looks like it is showing the Oregon trail, which led from Independence to Oregon.