It is a principle of economics that a nation can experience economic growth only when consumer confidence is balanced with a small amount of consumer skepticism. Which one of the following is an application of the economic principle above? ['Any nation in which consumer confidence is balanced with a small amount of consumer skepticism will experience economic growth.', 'Any nation in which the prevailing attitude of consumers is not skepticism will experience economic growth.', 'Any nation in which the prevailing attitude of consumers is exclusively confidence will not experience economic growth.', 'Any nation in which the prevailing attitude of consumers is either exclusively confidence or exclusively skepticism will experience economic growth.']