Based on __________,The Campbell's Soup Company Changed the Labels of Most

Based on __________,the Campbell's Soup Company changed the labels of most of its soup cans.

A) external secondary data-an article in the Journal of Consumer Behavior on ethnographic research
B) social media Facebook comments and Twitter "tweets" analysis
C) internal secondary data-sales reports on soup sales by flavor and package type (can or microwave bowl)
D) neuromarketing studies
E) online/e-mail questionnaires