What factor was the biggest contributor to the birth of sectionalism in the country? --increasing feelings of nationalism
-the need for trade with other countries
-economic differences between the states that accounted for varying desires and needs from government
-opinions on tariffs

Increasing feelings of nationalism

Explanation:

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the melanesian is basically practicing magic.

the doctrine of nullification recommended that states living inside the union have the one-sided, inalienable ideal to void any law made by the national government that could be esteemed illegal.

the united states was shaped based on a general agreement among its individual states. hence, it is inferred that under the hypothesis of invalidation, since the states are the establishment of the union, they have the ability to referee and disprove unlawful laws.