The idea that instead of congress, a territory itself should decide if it would like to be a free state or a slave state was known as

Popular sovereignty. Which means that people in the territories could vote for or against slavery. Hope this helps! ;)

the correct answer is d

a conference committee is a group of congress representatives appointed by the senate and the house to reach an agreement over a bill that had different versions in each chamber. this is due to the fact that, to pass a law. both the house and the senate must agree on the exact same content and wording of the bill to present it to the president.

it's a to start a war with the americans