Which word is a synonym for the word variation

The government of country c has passed a law protecting the physical safety of factory workers. this is an example of monetary policy. supply and demand. fiscal policy. regulatory policy.

Canada economy usa test prep i am stupid i don’t get it

Arecent poll of 500 residents in a large town found that only 36% were in favor of a proposed referendum to build a new high school. find the margin of error for this poll if we want 95% confidence in our estimate of the percentage of residents in favor of this proposed referendum.