A beam of $\alpha$-particles and $\beta$-particles is directed perpendicular to an electric field. Which statement correctly describes the particles' deflection in the field?
- A$\alpha$-particles deflect, but $\beta$-particles do not deflect.
- B$\alpha$-particles deflect in the opposite direction to $\beta$-particles.
- C$\beta$-particles deflect, but $\alpha$-particles do not deflect.
- DBoth $\alpha$-particles and $\beta$-particles deflect in the same direction.