Question: Upon receiving a `MobilityFromNRCommand` by the UE, what action does the UE take regarding timer T316 if it supports RLF-Report for fast MCG recovery procedure?
Option 1: Stop timer T316 and set elapsedTimeT316 in VarRLF-Report to the elapsed time of timer T316.
Option 2: Clear the information included in VarRLF-Report without stopping timer T316.
Option 3: Ignore timer T316 and proceed with inter-RAT mobility actions.
Option 4: Restart timer T316 for an additional predefined period.
Explanation: When a UE receives a `MobilityFromNRCommand` and it supports RLF-Report for fast MCG (Master Cell Group) recovery procedure, the UE is required to stop timer T316 and then set the elapsedTimeT316 in the VarRLF-Report to the value of the elapsed time of the timer T316. This action is crucial for reporting purposes, especially in scenarios where the UE needs to provide detailed information about its radio link failure (RLF) experience during the handover process between different radio access technologies (RATs).