Every Six Months,Doug Is Asked to Fill Out a Survey

Multiple Choice

Every six months,Doug is asked to fill out a survey in which he is asked when he expects to buy a new vehicle and what type and model he plans to purchase.Doug along with a group of consumers with similar buying habits has been participating in this survey for the last eight years.The gathering of this quantitative data would be an example of descriptive research using .

A) a cross- sectional design
B) ethnographic research
C) a hierarchical format
D) a longitudinal design
E) latitudinal tracking