Refer to the input text as context and select the correct relationship between 'Vodafone' and 'Verizon' from the available options.
Options: parent organization, subsidiary, headquarters location, chief executive officer

Technology firms including Intel Corp, Cisco Systems, Samsung Electronics and telecom giants Vodafone and Verizon (NYSE: VZ - news ) are betting heavily on Internet device-connected homes for future revenue and profit.
subsidiary