Alex is training for a triathlon, a timed race that combines swimming, biking, and running. alex has only 20 hours per week that he can devote to training for his race. which basic principle of individual choice does this sentence best illustrate? people usually exploit opportunities to make themselves better off. all costs are opportunity costs. many decisions are made on the margin. resources are scarce.

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.

The answer is that the answer is and ik it is because the answer is false.