Which of the Following Is an Example of Convergence Theory

Which of the following is an example of convergence theory in action?

A) Germany rebuilt its economy after World War II, creating more job opportunities and prosperity for its citizens.
B) Following the decline of the automotive industry, Detroit became a bankrupt city with large unemployment.
C) The suburbs of Paris became crime-infested after wealthier citizens moved into the city, pushing the lower classes out of their homes.
D) Washington DC has become a city to which many young people flock because of its low unemployment rate and job opportunities.