Question: What condition must be fulfilled for a UE to consider entering Event C2, related to the NR sidelink channel busy ratio being below a threshold?
Option 1: The measurement result of channel busy ratio (Ms) is greater than or equal to the threshold parameter (Thresh).
Option 2: The measurement result of channel busy ratio (Ms) minus the hysteresis parameter (Hys) is less than the threshold parameter (Thresh).
Option 3: The measurement result of channel busy ratio (Ms) plus the hysteresis parameter (Hys) is greater than or equal to the threshold parameter (Thresh), and then Ms becomes less than Thresh minus Hys.
Option 4: The measurement result of channel busy ratio (Ms) is less than or equal to the threshold parameter (Thresh) without considering any hysteresis.
Explanation: According to the text, Inequality C2-1 (Entering condition) requires that Ms plus Hys is greater than or equal to Thresh for a period of time before entering Event C2. This ensures that the UE does not enter the event prematurely due to temporary fluctuations in channel busy ratio measurements.