Final answer:
All the states mentioned in the question - Alabama, North Carolina, South Carolina, and Tennessee - border the state of Georgia, making option A the correct answer.
Step-by-step explanation:
The question asks which statement correctly describes the relationship between Alabama, North Carolina, South Carolina, and Tennessee. To answer this, we look at each option in relation to the subject of U.S. geography and these particular states.
Option A: Alabama, North Carolina, South Carolina, Tennessee border the state of Georgia. This is true. These states encircle Georgia, making them all contiguous with Georgia.
Option B: They border the state of Virginia. This is incorrect for Alabama and Tennessee - neither state shares a boundary with Virginia. North Carolina and South Carolina do border Virginia.
Option C: They are crossed by the Appalachian Trail. The Appalachian Trail does go through North Carolina and Tennessee, but not Alabama or South Carolina.
Option D: They are crossed by the Cumberland Plateau. The Cumberland Plateau extends into parts of Tennessee and Alabama, but not North Carolina or South Carolina.
Therefore, the correct answer is A) Border the state of Georgia, because all listed states share a boundary with Georgia.