The correct answer is $\boxed{\text{A. 0}}$.
A fuse is a safety device that is used to protect electrical circuits from damage caused by excessive current. When a fuse is installed in a circuit, it is connected in series with the load. This means that the current that flows through the fuse is also the current that flows through the load.
If the current through the fuse exceeds the rated current of the fuse, the fuse will melt and break the circuit. This will prevent damage to the load and the circuit.
A digital multimeter is a device that is used to measure electrical quantities such as voltage, current, and resistance. When a digital multimeter is set to the DC Ohms range, it will measure the resistance of the circuit that is connected to its probes.
The resistance of a fuse is very low when the fuse is good. This is because the fuse is made of a material that has a low resistance. When the fuse is good, the digital multimeter will read 0 ohms.
If the fuse is bad, the digital multimeter will read a value that is greater than 0 ohms. This is because the fuse is broken and there is a break in the circuit.
The other options are incorrect because they are not the resistance of a good 2 amp fuse.