How has the 1846 treaty of oregon stood the test of time? the border at the fifty-four forty line is still in effect today. oregon remains one of the fifty states of the united states. the border at the forty-ninth parallel is similar to one we have today. the treaty established friendly relations with spain that remain.

The correct answer is Oregon remains one of the fifty states of the United States.

In 1846, the United States and Great Britain had controversy of the land in the Oregon territory (which includes modern day Washington). After the War of 1812, Great Britain and the United States agreed to jointly occupy this territory. However, as America was spreading westward during the era of manifest destiny, there came a time when the federal government wanted to have complete control over this territory. This is when the US and British government came to an agreement, allowing Oregon to become a US territory and eventually a state.

B.Oregon remains one of the fifty states of the United States.

d) iowa i believe is the answer