A proton is accelerated from rest through a potential difference V$0$ and gains a speed v$0.$ If it were accelerated instead through a potential difference of $2$V$0,$ what speed would it gain?

Question $21$ options:

A$)$

$2$v$0$

B$)$

$4$v$0$

C$)$

$8$v$0$

D$)$

v$0$