How can you initiate an RTC reset?

Initiating a Real-Time Clock (RTC) reset is a procedure that helps to restore the system's time functions and can resolve specific hardware-related issues. The correct method involves connecting the system to AC power, ensuring that the system remains off. Holding the power button for 25 seconds effectively discharges any residual power from the motherboard, which may help to reset the RTC settings properly.

This process is crucial because it not only resets the clock but also ensures that any underlying issues tied to the system's configuration or hardware states are cleared out. The duration of 25 seconds is specifically chosen as it is long enough to ensure a complete reset while being short enough to avoid potential damage from prolonged pressure on the power button, which could be risky.

In contrast, other suggested methods either do not align with the necessary conditions for resetting the RTC—such as not being connected to power or not maintaining the system in an off state—or do not adhere to the recommended timing for a successful reset. Thus, option B is the most effective and safest approach to initiate an RTC reset.