Mucho Tacos Restaurants, Inc

Mucho Tacos Restaurants, Inc., is a chain of restaurants featuring authentic Mexican cuisine in seven states. The company is looking into opening restaurants in additional markets and also wants to expand and to improve its menu. Which of the following is an example of secondary data the owners of Mucho Tacos might find useful?

A) Information published by the U.S. Bureau of the Census that identifies which regions of the United States are experiencing the most rapid growth in Mexican-American population
B) Telephone survey by the marketing department of Mucho Tacos asking for opinions about the quality of the food at the restaurants
C) Focus group of teenagers who like Mexican food who are asked about their reactions to new food dishes the restaurant may offer
D) E-mail responses the chain receives to a series of customer satisfaction questions posted on its website