Answer:

C. 10,000

Step-by-step explanation:

First , figure out what number is in the ten thousands place,which is 11,345. Then look at the number that is on the left side of that number,which is 11,345. The rule in rounding of digits; If the number on the left side of that number is higher than 5, you will need to add 1 to that number that your basing of, the number next to the number that Is on ten thousands place (thousands) is not higher than 5, so you won't be needing to add, it remains the same while the other numbers that is on the left side of that number becomes 0, meaning the answer is 10,000. Hope this help at some point :)