The correct answer is D.
OBJ-1.5: The majority of vehicles do not currently have a mechanism by which an attacker can access a vehicle remotely. However, there have been numerous demonstrations where the CAN bus can be accessed and corrupted through an available diagnostic port within the automobile or unmanned aerial vehicle. The most typical security measure used is an airgap between a vehicle’s entertainment system (which may have internet access) and its CAN bus. Endpoint protection, anti-virus, and user and entity behavior analytics (UEBA) are not usually installed in vehicular networks as a security measure.