A Piece of Copper of Mass 100 G Is Being $\degree$

A piece of copper of mass 100 g is being drilled through with a ¹/₂" electric drill. The drill operates at 50.0 W and takes 30.0 s to bore through the copper. If all the energy from the drill heats the copper, find the copper's increase in temperature. (c_copper = 387 J/kg · $\degree$ C.)

A) 40.6 $\degree$ C
B) 38.8 $\degree$ C
C) 31.0 $\degree$ C
D) 27.3 $\degree$ C