Take context from the input text and decide on the accurate relationship between 'Trulia' and 'Zillow' from the options provided.
Options: business division, director/manager, parent organization, owner of

With the closing of its acquisition of competitor Trulia in February 2015, Zillow Group ( NASDAQ:Z ) ( NASDAQ:ZG ) became the largest business of real estate and home-related brands on the Internet.
parent organization