Answer:
The correct option is C. 5.123
Explanation:
To find 0.1 more than 5.023, it just mean we will add 5.023 and 0.1 together
When adding, we will arrange them, such that 0.1 will be 5.0, when we do that, 5.0 + 0.1 =5.1
then we will put our remaining numbers after 5 .0 back the way they are
That is; we are going to have 5.123
Therefore the correct option is C. 5.123