As the magnet slides down the copper tube... $[$Select all options that apply by entering a string of letters. For example: If you believe X$,$ Y$,$ and Z are true, then enter $\text{'}$XYZ$\text{'}$ without the quotation marks.$]$

A$)...$it accelerates due to gravity, as expected.

B$)...$it becomes electrically charged and is attracted to the copper.

C$)...$it appears to move at a constant speed instead of getting faster due to gravity.

D$)...$it produces circular loops of current in the copper tube.