A computer repair technician must open a computer case to remove and replace a graphics card. An ESD mat and strap are not available. Which of the following should be done PRIOR to touching the components? (Select two.)
A. Touch both hands to a bare-metal portion of the chassis.
B. Take off shoes and any headwear.
C. Remove all jewelry.
D. Remove the power supply unit.
E. Place the chassis on a non-metal surface.