Abraham Lincoln objected to the Kansas-Nebraska Act because he thought ... ~ the Missouri Compromise should be passed instead. ~ the act would force Northerners to track fugitive slaves. ~ the issue of popular sovereignty should be respected. ~ the repeal of the Missouri Compromise was wrong. (I believe it is the last one.)

Although Lincoln was never a 'direct abolitionist,' one thing he did want to stop was the expansion of slavery going westward. He said he was not going to touch the current slavery in the south, he only wanted to stop the growing of slavery. The Missouri Compromise came first, so the first choice is wrong. The second choice makes no sense because the Kansas-Nebraska Act was passed to make fortified lands for a transcontinental railroad. So, I would put the choice "The repeal of the Missouri Compromise was wrong" because it was established long before the Kansas-Nebraska Act.