Utilize the input text as a context reference, choose the right relationship between 'Yum Brands' and 'Pizza Hut' from the options.
Options: platform, owner of, member of, chairperson

The company has been outperforming rivals such as Yum Brands Inc's (YUM.N) Pizza Hut and McDonald's Corp (MCD.N) in the United States due to the digital investments, which make it easier for customers to order pizzas using methods such as smart watches and digital wallets.
owner of