Suppose a Market Researcher Was Consulting Several Sources of Information

Multiple Choice

Suppose a market researcher was consulting several sources of information about the best location for a high-end furniture store,and found the following:
Percent of Luxury Purchases
2010 2011
City Census of Retailing Chamber of Commerce
Metropolis 5% 12%
Smallville 7% 17%
Gotham City 4% 10%
The Chamber studies were more recent,but how reliable is this new information? Why should the researcher question the numbers in the Chamber studies?

A) age of the Chamber studies
B) how the information was collected
C) consistency of the Chamber information with the Census
D) sufficiency of the information collected
E) purpose of the study