A Carbon Resistor Has a Resistance Of $18 \Omega$ At a Temperature Of

A carbon resistor has a resistance of $18 \Omega$ at a temperature of $20 ^ { \circ } \mathrm { C }$ . What is its resistance at a temperature of $120 ^ { \circ } \mathrm { C }$ ? The temperature coefficient of resistivity for carbon is $- 5.0 \times 10 ^ { - 4 } / \mathrm { C } ^ { \circ }$ .

A) $16 \Omega$
B) $15 \Omega$
C) $18 \Omega$
D) $17 \Omega$