The correct option is C Nagpur
The industrial working classes had not participated in the Civil Disobedience Movement in large numbers, except in the Nagpur region. As the industrialists came closer to the Congress, workers stayed aloof. But in spite of that, some workers had participated in the Civil Disobedience Movement, selectively adopting some of the ideas of the Gandhian programme, like boycott of foreign goods, as part of their own movements against low wages and poor working conditions.