$12\mathrm{.}12.$ Imagine particles that are placed in a region of space that has varying levels of voltage from place to place. The particles all start at rest and are allowed to move freely. Which of the following statements is true? $[$Select allall correct options. If X and Y are correct, enter your answer as a string $\text{'}$XY$\text{'}$ without the quotation marks.$]$

A$)$ A negative charge will move from areas with lower voltage to areas with higher voltage.

B$)$ A negative charge will move from areas with higher voltage to areas with lower voltage.

C$)$ A positive charge will move from areas with lower voltage to areas with higher voltage.

D$)$ A positive charge will move from areas with higher voltage to areas with lower voltage.