The five largest markets, by country, for marketing research are:

A. United States, United Kingdom, Germany, France, and China.

B. China, India, United States, and Brazil.

C. United States, Germany, France, India, and United Kingdom.

D. United States, China, India, Saudi Arabia, and United Kingdom.

A. United States, United Kingdom, Germany, France, and China.

Explanation:

These countries has held their head up high for a very long time in terms of productivity, self sustainability and a large stance independence. They are the backbone of production ranging from automobile to tech gadgets, chemical and materials in production. They are now the pillars of modern day economic growth and adverse civilization too.

In recent times according to researches and major surveys the latest data on market trends and opportunities, consumption, production, imports, exports and price developments.