The Kansas-Nebraska Act

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

abolished slavery
abolished slavery

mapped out railroad lines through Kansas and Nebraska
mapped out railroad lines through Kansas and Nebraska

effectively overturned the Missouri Compromise of 1820
effectively overturned the Missouri Compromise of 1820

allowed states to decide if slavery was legal within their borders
allowed states to decide if slavery was legal within their borders

The Kansas-Nebraska Act effectively overturned the Missouri Compromise of 1820 and allowed states to decide if slavery was legal within their borders.