Subtract 23,751 from 56,879.

A. 23,128
B. 33,128
C. 80,630
D. 33,028

The answer is A. 23,128.

To subtract 23,751 from 56,879, first line up the numbers vertically:

56,879
- 23,751

Start by subtracting the ones place:

56,879
- 23,751
_______
33,128

Therefore, the answer is option B. 33,128.

To subtract 23,751 from 56,879, you can follow these steps:

1. Start by aligning the numbers vertically, with the ones column (rightmost column) lined up.
56,879
- 23,751

2. Begin subtracting from the rightmost column (ones column). Subtract 1 from 9, which equals 8. Write down 8.

56,879
- 23,751
-----
8

3. Move to the next column (tens column). Subtract 5 from 7, which is not possible since 5 is greater than 7. To do this, borrow 1 from the next column. So, subtract 5 from (7+10), which equals 2. Write down 2.

56,879
- 23,751
------
28

4. Move to the next column (hundreds column). Subtract 7 from 8, which equals 1. Write down 1.

56,879
- 23,751
------
128

5. Continue to the next column (thousands column). Subtract 3 from 6, which equals 3. Write down 3.

56,879
- 23,751
------
3,128

So, the correct option is A. 23,128.