A child is holding a slim metal wire that is fastened to a kite. The graph illustrates how the wire’s extension changes as its tension changes. A gust of wind raises the tension from $100\,\text{N}$ to $150\,\text{N}$. What is the increase in the elastic potential energy of the wire caused by the gust of wind?
- A$3.8\,\text{mJ}$
- B$19\,\text{mJ}$
- C$34\,\text{mJ}$
- D$38\,\text{mJ}$