A Hot (70 $\degree$ C) Lump of Metal Has a Mass of 250 G

A hot (70 $\degree$ C) lump of metal has a mass of 250 g and a specific heat of 0.25 cal/g· $\degree$ C. John drops the metal into a 500-g calorimeter containing 40 g of water at 20 $\degree$ C. The calorimeter is constructed of a material that has a specific heat of 0.10 cal/ g· $\degree$ C. When equilibrium is reached, what will be the final temperature? (c_water = 1.00 cal/g· $\degree$ C.)

A) 114 $\degree$ C
B) 72 $\degree$ C
C) 40 $\degree$ C
D) 37 $\degree$ C