Answer:
a pair of parallel helices intertwined about a common axis, especially that in the structure of the DNA molecule.
Answer:
Characteristics of the Articles of Confederation
Explanation:
i think it would be C the reason for this is being that the definition of a quota is a limit on trade,and the question is asking for a way to limit it. an embargo limits all trade between a country, and a tariff raises the tax on trade and why would you want to decrease the safety standards? these are my reasons for it being : C. A quota on imports and exports
hope this helps