What is the acceptable condition for securing the electrical line?

The correct answer reflects the importance of having sufficient slack in the electrical line to allow for the necessary movement during turns. When a vehicle makes a turn, components including the electrical lines must be able to flex to prevent tension that could lead to damage or disconnection. Having enough slack ensures that the electrical line isn't pulled taut, which reduces the risk of strain on the connectors and the wiring.

While securing the electrical line is crucial for safety, being too tight or trying to eliminate all slack can create problems. It’s important to strike a balance between securing the line and allowing enough flexibility for safe maneuverability. Hence, ensuring the electrical line has some slack is essential for both safety and functionality when making turns.

The other options don’t provide the necessary focus for safe operation while driving. Having no slack can lead to damage, and it is indeed necessary to check the condition regularly. Tying the line to the chassis could also restrict necessary movement, potentially causing issues during operation.