The situation known as the "positive feedback loop" describes (5 points) A when improvements in the reduction of greenhouse gases result in improvements in solving global warming
B a situation in which people pass along positive steps people can take to reduce greenhouse gases
C the positive impact of some of the greenhouse gases in keeping our planet habitable
D when warming causes changes that leads to more warming

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Explanation:

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explanation:

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.