Which Statement About Class Systems Below Is Accurate

Which statement about class systems below is accurate?

A) The world has fewer class-based societies than in the past.
B) Many advanced democracies have achieved economic equality in their societies.
C) In today's global economy, the advantages that were once available to people who control economic means of production are disappearing.
D) In today's global economy, the people who control the means of economic production have more advantages than ever.