Answer:
B- 3,500.
Explanation:
This is because 3,500 is the lowest number that can be rounded to 4,000.
3,999 and 4,001 can also be rounded but.. (let me show you an image to help).
3,500 < 3,999 < 4,001.
That goes from smallest to largest numbers that round to 4,000.
Hope that helps. x