Object A, with Heat Capacity C_A and Initially at Temperature

Object A, with heat capacity C_A and initially at temperature T_A, is placed in thermal contact with object B, with heat capacity C_B and initially at temperature T_B. The combination is thermally isolated. If the heat capacities are independent of the temperature and no phase changes occur, the final temperature of both objects is:

A) (C_AT_A - C_BT_B) /(C_A + C_B)
B) (C_AT_A + C_BT_B) /(C_A + C_B)
C) (C_AT_A - C_BT_B) /(C_A - C_B)
D) (C_A - C_B)
E) (C_A + C_B) 11ef181b_aacf_e68f_b5ce_19b6b0f164d3_TB10137_11