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The circuit below consists of a variable...

The circuit below consists of a variable resistor connected in series with two 2000 `Omega` resistors. The variable resistor can be adjusted to any value between 0 - 4000 `Omega`.

As the resistance of the variable resistor is changed, what is the smallest possible reading on the voltmeter?

A

0 V

B

3 V

C

4 V

D

6 V

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