An electron travels from point X to point Y through a uniform electric field, as illustrated. The separation between X and Y is $4.0\,\text{cm}$, and the line XY makes an angle of $60^\circ$ with the field direction. The field provides the only force acting on the electron. The magnitude of the field is $100\,\text{N C}^{-1}$. Determine the change in kinetic energy of the electron as it moves from X to Y?
- A$-4\,\text{eV}$
- B$-2\,\text{eV}$
- C$+2\,\text{eV}$
- D$+4\,\text{eV}$