Fact 1: Wiring requires an electrical conductor.

Fact 2: Most electrical conductors, such as wires, are made of copper or gold.

Given the two facts above, answer the question "Wiring requires a material such as copper or what?" with the following options: 
- stainless steel
 - energy
 - gold
 - fibers
 - LEDs
 - tube
 - wood
 - rubber


 

   gold      