Answer:
Let's look at each number separately. Look in the tens place to determine which way to round.
4,070 will round up since there's a 7. However, it will only round up to 4,100 so this is not the right answer.
4,617 will round down since there's a 1. However, it will only round down to 4,600 so this is not the right answer.
4,681 will round up since there's an 8. This number will round up to 4,700 so this is the correct answer.
4,797 will round up since there's a 9. However, it will only round up to 4,800 so this is not the right answer.
The correct answer is 4,681.