In an Experiment, 100 $\degree$ C Is Quickly Transferred to 100 $\degree$

In an experiment, 100.0 g of water at 40.00 $\degree$ C is quickly transferred to 100.0 g of water in a calorimeter at 20.00 $\degree$ C.The final temperature comes to 27.50 $\degree$ C.What is the approximate heat capacity of the calorimeter? [c_p(water) =4.184 J/(g . $\degree$ C) ]

A) 697 J/ $\degree$ C
B) 669 J/ $\degree$ C
C) 167 J/ $\degree$ C
D) 279 J/ $\degree$ C
E) 1120 J/ $\degree$ C