Marya plans a demonstration to show an object being charged by friction. What must she be sure to do when performing the demonstration?
Select all that apply. A. to use a metal like aluminum B. to use an insulator like rubber C. to touch a metal sphere with a charged rod D. to move a charged rod near a metal sphere E. to rub the insulator on hair or fur to transfer charge F. to move two metal spheres so they touch each other