$\alpha$-particles, $\beta$-particles and $\gamma$-rays are given off by radioactive nuclei during decay. Which of these emissions can be deflected by an electric field?
- A$\alpha$-particles, $\beta$-particles and $\gamma$-rays
- B$\alpha$-particles and $\beta$-particles only
- C$\beta$-particles and $\gamma$-rays only
- D$\gamma$-rays and $\alpha$-particles only