A student assembles a circuit containing a resistor X. The ammeter shows a reading of $2.0\,\text{A}$. The voltmeter shows a reading of $6.0\,\text{V}$. She must make a circuit whose total resistance is $10\,\Omega$. Which resistor should she connect in series with the circuit?
- A$2\,\Omega$
- B$3\,\Omega$
- C$7\,\Omega$
- D$10\,\Omega$