Complete the Sequence: Finding Numbers Before and After 6000

To solve this problem, we need to find the numbers just before and after 6000. This involves simple arithmetic calculations.

• Finding the Predecessor:
  The predecessor is the number before 6000. To find it, we subtract 1 from 6000:
  $\text{Predecessor} = 6000 - 1 = 5999$.
• Finding the Successor:
  The successor is the number after 6000. To find it, we add 1 to 6000:
  $\text{Successor} = 6000 + 1 = 6001$.

Thus, the complete sequence is $5999, 6000, 6001$.

Now, we compare this result to the provided choices. Our calculations match the correct choice:

The correct answer to the problem is: $5999,6001$.