British telco Vodafone -- which owns a 40 per cent stake at Safaricom and a further 82.2 per cent in Vodacom Tanzania -- said the continued growth of mobile money is attributed to the fact that it services consumers at the bottom of the pyramid who cannot access banking services.
What is the relationship between 'Vodafone' and 'Vodacom Tanzania' in the context of the input sentence.
Options: location of formation, legal form, platform, subsidiary