Which states are considered Border States that did not secede from the Union during the Civil War?

The correct answer highlights the states that were crucial to the Union during the Civil War due to their geographic location and economic significance. The Border States—Delaware, Maryland, Kentucky, and Missouri—were slave states that did not secede from the Union, playing a vital role in the conflict.

Kentucky, for instance, was a strategic location for both Union and Confederate armies due to its resources and position along critical transportation routes. Baltimore, Maryland, was significant for its proximity to the nation's capital, Washington, D.C., and Delaware, though small in size, had crucial access to the port of Philadelphia. Missouri was pivotal because it had a mix of pro-Union and pro-Confederate sentiments, leading to internal conflict within the state.

In contrast, the other answer choices include states that either did not meet the criteria of being Border States or were not involved in the Civil War as non-seceding states. For instance, Rhode Island and the other states listed in the incorrect answers are aligned differently in the narrative of the Civil War, either being firmly in the Union or belonging to the Confederacy, which is not the focus of Border State status.