Need asap! brainliest will be granted if the answers right!

just wanted to give a recommendation. so, this isn't a question
( i also recommend you guys to listen to neffex - fave songs: destiny, things are gonna get better, and rumors}

but this is ∨

He wrote it on behalf of the united states I'm pretty sure.

This is what I found...Open Door policy, statement of principles initiated by the United States in 1899 and 1900 for the protection of equal privileges among countries trading with China...Does this help you?

I might have got it mixed up but the northerners were slave owner and the fugitive slave act was an act to get rid of slavery.  It angered the northerners because it would mean they will either one pay the african americans or two let them be free. 

not entirely postive i might have got it mixed up with northerners or southerners but i hope im right 

hope this help