A piece of metallic nickel initially at 120 °C has exactly three times the mass of a piece of nickel initially at 60.0 °C. If the two pieces of nickel are placed in a calorimeter and allowed to come to the same final temperature, what is this final temperature? Neglect the heat capacity of the calorimeter structure and heat exchange with the surroundings.

A. 75.0 °C
B. 85.0 °C
C. 90.0 °C
D. 95.0 °C
E. 100 °C
F. 105 °C