What is the role of free markets in the economy ​

 It contributes to political and civil freedom, in theory, since everybody has the right to choose what to produce or consumer. It contributes to economic growth and transparency. It ensures competitive markets.

answer: b) the us is the leading importer but not the leading exporter.

extra info:

the u.s is the largest importer but it is not the largest exporter as china sits on the top of the table when it comes to leading exporters.

but u.s is not far from first,

they rank in 2nd globally as the worlds largest exporter.

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answer; the above statement is (true);