The answer is A: Social injustice of the rich toward the poor.
Charles Dickens, the great English writer from the 19th century, is well known for his prose and his novels that, to this day, still captivate young and old readers alike. In his works, like A Christmas Carol, one can clearly identify his concern for the poor and the injustices that the rich class imposed on them. He was a vehement and brilliant defender of the welfare of the disenfranchised and a harsh critic of the rich.