The Voice Has Gained a Loyal Viewer Base as Customers

Multiple Choice

The Voice has gained a loyal viewer base as customers enjoy the reality vocal competition show featuring recording artists Blake Shelton,Pharrell Williams,Adam Levine and Christina Aguilera as judges in its 11th season.Viewers were able to vote for their favorite artists using social media such Facebook or Twitter as well as the Voice App available for Android or Apple customers.The ability to vote for a viewer's favorite performer created higher levels of interaction between the audience and the show and led to higher viewership ratings.NBC has demonstrated the successful use of level _____ marketing.​

A) ​two
B) ​one
C) ​zero
D) ​four