Final answer:
The mechanical advantage of the inclined plane is 2.5.
Step-by-step explanation:
The mechanical advantage of an inclined plane can be calculated by dividing the length of the inclined plane by its height.
In this case, the length of the inclined plane is 5 m and the height is 2 m. Therefore, the mechanical advantage is 5/2 = 2.5.
So, the correct answer is b) 2.5.