The diagram illustrates the path taken by $\alpha$-particles as they move between two charged plates. Their path bends downwards. What occurs to $\beta$-particles passing through the same electric field?
- AThey are deflected downwards more than the $\alpha$-particles.
- BThey are deflected upwards.
- CThey are not deflected at all.
- DThey are deflected downwards by the same amount as the $\alpha$-particles.