Which company holds the Guinness World Record for the largest market research survey ever conducted, gathering data from over 19 million consumers across multiple countries?

Market research helps companies understand consumer preferences and behaviors, but some studies go beyond the ordinary. In the quest to gather comprehensive data, one consumer research project broke world records with its extraordinary scale. This poll tests your knowledge about the most extensive consumer research study ever conducted in terms of participants surveyed. Do you know which brand or organization holds this impressive achievement?

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Nielsen Global Consumer Confidence Survey
Google Consumer Barometer Project
Unilever's 'People Data Centre' Global Study
Amazon Customer Behavior Analytics Program