Some Cell Phone Providers Are Now Offering Hardware,like Small Laptops,and

Some cell phone providers are now offering hardware,like small laptops,and media to play on it,like songs and TV shows.Phone companies believe that each product they offer will encourage and promote other products,as phones can easily send data to laptops,which can store media that can easily be watched on phones,and so on.What is this called?

A) media concentration
B) conglomeration
C) bandwidth
D) synergy