The correct answer is $\boxed{\text{C. 0}}$.
A fuse is a safety device that is designed to protect electrical circuits from damage caused by excessive current. When a fuse is good, it will allow current to flow through it without interruption. However, if the fuse is blown, it will break the circuit and prevent current from flowing.
The resistance of a fuse is determined by its material and construction. The resistance of a good fuse is very low, typically less than 0.1 ohms. This is because the fuse is designed to allow current to flow through it easily. However, if the fuse is blown, its resistance will be very high, typically greater than 100 ohms. This is because the fuse is designed to break the circuit and prevent current from flowing.
In the case of a 2 amp system, the fuse should have a resistance of less than 0.1 ohms. If the meter reads anything higher than this, it indicates that the fuse is blown and needs to be replaced.