There are three main components needed to make a complete circuit. First, a power source is need, such as a battery. Next, you will need something that will take in the power. This can be anything like a heating coil, or light bulb, etc. Then you need the wiring that will connect to the object and receive power.
I think it's A
cause it's big and will not fit.
It’s passive in my view
Hope it helps
