If a perfectly competitive firm is a price taker, then: a) pressure from competing firms will force acceptance of the prevailing market price.
b) quality differences will be very perceptible and will play a major role in the purchaser's decisions.
c) it can increase or decrease its output without affecting the overall quantity supplied in the market.
d) it must be a relatively small player compared to its competitors in the overall market.

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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.