The township of roma is now inhabited by lusaka's professional class. under the british, it was inhabited exclusively by privileged whites. in both cases, roma's maids and gardeners come from the informal settlement to the northwest. this is an example of:

This is an example of how segregation by race has been replaced by segregation by class.
Race is not an issue anymore in this town, however, people are segregated based on their class. Professional class, as well as the privileged whites live in one part of the town, whereas maids and gardeners are left with other parts of the town to live in, not mixing with the upper classes.

Ithink the answer is d.