Objective, it can’t be proven.
Answer: A. ". . .The energy of the game is more than the energy we partners put in."
The theme that the author wants to convey is that of different parts coming together in order to achieve something that is bigger than the parts themselves. This sentence expresses this sentiment the best by explaining that the energy of the game is more than the sum of the energy each one of the partners puts in. In other words, the whole is greater than the sum of its parts.
