What is a printed circuit board (PCB)?

Select one answer.

• An insulating board with thin copper pathways bonded to it that both holds the components in place and wires them together electrically.
• A single solid block of pure metal that every one of the electronic components is individually bolted down onto with screws, with no copper wiring of any kind involved at all.
• A type of rechargeable battery.
• A software file describing a circuit.