The Mediterranean Cafe Featuring Light Cuisine and Folk Entertainment Is

The Mediterranean Cafe featuring light cuisine and folk entertainment is located in the middle of an upper class neighbourhood.The owners are curious about where the customer base lives so that it can target direct mail to those areas.For the last several weeks,employees recorded names from reservations and credit cards,so that phone books or the Internet could be used to locate customer addresses.The Mediterranean Café is engaging in:

A) customer clustering
B) customer spotting
C) primary research
D) geographic research
E) residential research