A Filament Has a Resistance of 0 $\Omega$ At 20°C If the Resistance Becomes 0

Multiple Choice

A filament has a resistance of 0.10 $\Omega$ at 20°C. If the resistance becomes 0.14 $\Omega$ when the temperature of the filament increases to 90°C, the temperature coefficient of resistance for this material is

A) 5.7 *10^-3/°C.
B) 5.7 * 10^-4/°C.
C) 4.4 * 10^-3/°C.
D) 4.4 * 10^-4/°C.