Question: Upon receiving a `reportConfigToRemoveList` from the network, what action(s) does a User Equipment (UE) take for each `reportConfigId` that matches an entry in its current `VarMeasConfig`?
Option 1: Only remove the matching `reportConfigId` from the `reportConfigList` within the `VarMeasConfig`.
Option 2: Remove all associated `measId` from the `measIdList`, but do not touch the reporting timers.
Option 3: Remove the entry with the matching `reportConfigId` from the `reportConfigList`, remove all associated `measId` from the `measIdList`, stop and reset relevant reporting timers (periodical or T321) for removed `measId`, and also remove measurement reporting entries for those `measId`.
Option 4: Ignore the instruction if the `reportConfigId` is not recognized, and only partially update the `VarMeasConfig` without touching associated `measId` or timers.
Explanation: This option correctly encompasses all required actions: removing the configuration entry, associated measurement IDs, stopping/resetting relevant timers (either periodic or T321), and deleting measurement reporting entries for those IDs, ensuring the UE's configuration is fully updated according to the network's instructions.