Final answer:
The performance element for an Autonomous Car intelligent agent most probably involves safety, speed, and cost.
Step-by-step explanation:
The performance element for the Autonomous Car intelligent agent, as represented by the PEAS framework, would most probably involve safety, speed, and cost.
In the case of an Autonomous Car, safety is crucial since the agent's primary function is to navigate traffic and ensure the well-being of passengers and pedestrians. Speed is also important as the agent needs to efficiently reach its destination. Lastly, cost plays a role as factors like energy efficiency and maintenance expenses need to be considered for effective car operations.