Answer:
The possible correct options can be:
Investment and Trade off of present for future benefits.
Explanation:
Consider the provided information.
They have 15 silver coins.
They can spend their winnings immediately and live the good life for a while, or they can spend the money on training for the next tournament.
They ultimately decide to spend most of the winnings on training for the next tournament.
They have two options but they choose spend most of the winnings on training, The reason behind it they want to invest the money so that they can get future benefits.
So the possible correct options can be:
Investment and Trade off of present for future benefits.