The correct answer is C. _____00.
A continuity test is used to check if there is a complete circuit between two points. To do this, you connect one end of a multimeter to one point and the other end to the other point. If the multimeter shows continuity, then there is a complete circuit. If the multimeter does not show continuity, then there is no complete circuit.
In option A, all of the digits are 0. This means that there is no connection between the two points. This is not a valid continuity test.
In option B, all of the digits are 0000. This also means that there is no connection between the two points. This is not a valid continuity test.
In option C, there is a single digit that is not 0. This means that there is a connection between the two points. This is a valid continuity test.
In option D, there are no digits. This means that there is no connection between the two points. This is not a valid continuity test.