The Kansas-Nebraska Act

Question
Which of these did the Kansas-Nebraska Act do?(2 points)
Responses

effectively overturned the Missouri Compromise of 1820
effectively overturned the Missouri Compromise of 1820
abolished slavery
abolished slavery
allowed states to decide if slavery was legal within their borders
allowed states to decide if slavery was legal within their borders
mapped out railroad lines through Kansas and Nebraska

The correct responses are:

- effectively overturned the Missouri Compromise of 1820
- allowed states to decide if slavery was legal within their borders