Who advocated for annexing western lands arguing that manifest destiny and the superirotiy of american instidutinons compelled the united states to expand its borders westward to the pacific ocean and what were the results from the arguement?

The answer is: John L. O’Sullivan

Explanation:

Journalist O’Sullivan, first wrote of “manifest destiny” in 1845, while not using the term "manifest destiny", did predict a "divine destiny" for the United States.

Despite disagreements about Manifest Destiny’s validity at the time, O’Sullivan had touched the national sentiment.

The impatient English who colonized North America in the 1600s and 1700s immediately looked westward and instantly considered ways to expand.

definitely a for sure. ill see and update if i get the answer

it provided for equal trade rights among nations in china.