Indian Institute of Foreign Trade 2012 Solved Paper

The author says 'The format is pretty much the same and the return of Amitabh Bachchan restores to the show both the gravitas and the empathy that has been its hallmark'
From this we can conclude that Unlike most reality shows, KBC has gained viewership on television by Connecting with the depth and reality of lives of people.
Hence, option D is the correct answer.