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

this is not a question its simply asking you to read and write a few sentences and   the question on the bottom its fairly easy, you can do this!

1. it was caused by feudalism

2. charlemagne used christianity as a major cornerstone for his rule. cloisters were built all over the empire to act as centers for the (re)population of the vast european wilderness.

3. the europeans feared the next raid every time chetak

i'm not so sure about #6. but i hope i you with the first 3.