An object is transported in a vertical plane from X to Y, and then from Y to Z, as shown in the diagram. The distances between the different points are marked on the diagram. The lines XY and VZ are vertical. The object has a weight of $20\,\text{N}$. How much gravitational potential energy does the object gain when it moves from X to Z?
- A$60\,\text{J}$
- B$120\,\text{J}$
- C$140\,\text{J}$
- D$260\,\text{J}$