What is the most significant and lasting legacy from the presidency of James K. Polk? A. The Oregon Treaty of 1846

B. Vast land acquisitions

C. The re-establisment of the U. S. Treasury

D. The founding of the Naval Academy

B

Explanation:

Polk's administration was notable for territorial expansion, including the Oregon Territory and the Mexican Cession.

Most important thing to note is the territorial expansion so please get confused with A because it was the treaty itself it was the land

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.

that is probably something for you to answer