A copper wire resists 3.8 Ω at ice point and 13.8 Ω at steam point, and the resistance of wire is 5 Ω the room temperature would be

A copper wire resists 3.8 Ω at ice point and 13.8 Ω at steam point,

1.	A copper wire resists 3.8 Ω at ice point and 13.8 Ω at steam point, and the resistance of wire is 5 Ω the room temperature would be
A.	7 °C
B.	2.5 °C
C.	12 °C
D.	7.5 °C
Answer» D. 7.5 °C