Answer:
The correct option is C) 0.25.
Step-by-step explanation:
Consider the provided numbers.
We need to find the difference using the number line.

Open the parentheses:

This indicate that the arrow will starts from -0.25 and move 0.5 units to right. Arrow will move right because 0.5 is a positive number.
The difference using the number line is shown in figure 1.

Hence the correct option is C) 0.25.