The six member countries that have embraced a common market are disappointed with the outcome of their economic integration. they want something that entails a closer economic integration and cooperation than a common market and decide to pursue a common currency. they are forming a(n)

Ibelieve that the answer is d. because that is the only option that is efficient.

The business cycle is the periodic but irregular up-and-down movement in economic activity, measured by fluctuations in real gross domestic product (gdp) and other macroeconomic variables. a business cycle is typically characterized by four phases—recession, recovery, growth, and decline—that repeat themselves over time. economists note, however, that complete business cycles vary in length. the duration of business cycles can be anywhere from about two to twelve years, with most cycles averaging six years in length. some business analysts use the business cycle model and terminology to study and explain fluctuations in business inventory and other individual elements of corporate operations. but the term "business cycle" is still primarily associated with larger (industry-wide, regional, national, or even international) business trends.

Iwould say the answer is 4.