List three ways that california changed after the United States claimed it during manifest destiny

Aside from low birthrates and high death rates, what can cause a country’s population to decline

Why did the mujahedeen receive us support even though they were against some american ideals

Ineed an answer asap. which is not a reason for the “era of good feeling”? a) economy in the us was booming. b) the united states was victorious in the war of 1812. c) the united states outlawed slavery. d) the federalist party was disbanded and the united states had one political party.