Which of the following terms is a synonym for nullify? establish
reinstate
cancel
ratify

How did the end of the mexican american war result in growing sectionalism in the united states?

Imagine you are driving down the highway and reading a sign that states save the planet don't litter which technique of policy enactment is being used

Are people more motivated to change from positive or negative experiences, like slavery, womens rights, and any other historical movements/moments? i need more factual information than opinions.