Assistance needed with an ESD question

[quetzalcoatl]

Which electrostatic discharge (ESD) precaution should you take before beginning to work on a computer?

a- Use power outlet to establish a grounded connection to the computer
b- Wear a wrist strap and ground to the common ground point
c- Discharge any built-up static by touching a metal part of the chassis
d- Store all electronic parts in a plastic bag

Thanks-in-advance!
-rob

 

[SNGX1275]

B. although c is actually the most commonly used