Which option is available if a participant's trading system is temporarily non-functional?

The option related to the use of a trading on behalf service is a crucial resource when a participant's trading system encounters temporary non-functionality. This service allows participants to delegate their trading activity to another party or system, ensuring that their trading operations can continue seamlessly despite technical challenges. This means that a participant can still execute trades, manage positions, and react to market changes without interruption.

In situations where a trading system is down, this alternative eliminates the need for participants to sit idle, optimizing their ability to participate in the market actively. It provides a safety net, especially during volatile market conditions when timely trading is essential. Participants can rely on their brokers or another trusted entity to execute trades on their behalf, ensuring that their market strategies are not hindered by technical difficulties.

Other options may not provide the same level of continuity or may involve additional complexities or limitations that do not serve the participant's immediate needs as effectively.