1. The problem is to round the number 23455 to the nearest 10. 2. Identify the digit in the tens place and the digit right after it (ones place). 3. The digit in the tens place of 23455 is 5, and the digit in the ones place is 5. 4. According to rounding rules, if the ones digit is 5 or more, round the tens digit up. 5. Since the ones digit is 5, we round the tens digit from 5 up to 6. 6. The number rounded to the nearest 10 is then 23460. 7. Therefore, the correct choice is A. 23460.