How were the monroe doctrine and the adams-onis treaty similar?
both were treaties which protected native american lands.
both were reasons for the war between the u. s. and mexico.
both were actions to expand borders and u. s. influence.
both were agreements signed between the u. s. and spain.

Explanation:

The Monroe Doctrine may appear to be confusing as it is a neutralist principle, yet  truth be told it expanded the American impact. With this the US guaranteed to remain  far from the undertakings of the European countries yet it won't endure their  impedance in the undertakings of the western half of the globe and the nations there. Along these lines,  with this the US extended their impact to the who side of the equator. The Adams-Otis  bargain consumed the American domains as it was an arrangement by which the United  States procured Florida.

The third option

Explanation:

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this act gave the federal government the power to relocate any native in the east to territory west of the mississippi river.