In a business cycle, a contraction occurs when: A. a period of economic growth reaches its highest point.
B. the economy slows down following a period of growth.
C. a period of economic decline reaches its lowest point.
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D. the economy begins to show growth in key economic indicators.

B. The economy slows down following a period of growth.

Explanation:

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the correct answer is modern american cars are not available due to trade restrictions.

trade between cuba and the united states have serious restrictions. the u.s. imposed an economic embargo on cuba, that among other things means that modern american cars are not available due to trade restrictions.

in response to some governmental actions of the authorities from cuba, president john f. kennedy proclaimed an embargo on trade between both countries in february 1962. the trade embargo remains active until this day and was implemented directly by the departments of commerce and the department of treasury.

in president trump’s administration, there is a national security presidential memorandum that "strengthens the policy of the u. s.", affecting trade with cuba.

it's the under parts of the car