Answer: option C is the most correct answer. A strong sense of fairness on the part of the proposers.
Explanation: The ultimatum game is a type of game that is used to experiment the economy, which comprise of two players, which are the proposers and the responder. In this game, the proposer is given a sum of money, which he has to decide the amount which the responder will receive. The proposer will only want to share the amount in equal part, just to be fair to the responder in the game. It's either the responder accepts the money or rejects it.