When 90 KJ Is Removed from a 2-Kg Copper Bar $\circ$

Multiple Choice

When 90 kJ is removed from a 2-kg copper bar, its temperature drops from 200 ^$\circ$ C to 85 ^$\circ$ C.The specific heat of iron is

A) 0.16 kJ/kg. ^$\circ$ C.
B) 0.19 kJ/kg. ^$\circ$ C.
C) 0.23 kJ/kg. ^$\circ$ C.
D) 0.39 kJ/kg. ^$\circ$ C.