Industrial exhibitions play a major role in a country's economy. Such exhibitions,now regularly held in Delhi, enable us to measure the extent of our own less advancedindustrial progress and the mighty industrial power and progress of countries like theU.K., U.S.A. and Russia whose pavilions are the centers of the greatest attention andattractionsThe passage best supports the statement that industrial exhibitions -

• A. Greatly tax the poor economies
• B. Are more useful for the developed countries like U.S.A. whose products stand out superior to those of the developing countries.
• C. Are not of much use to the countries that are industrially backward.
• D. Boost up production qualitatively and quantitatively by analytical comparison of a country's products with those of the developed countries.