In the vedic age trade was limited because of a) isolationism, causing people not to trade with each other b) poor roads, causing people to use the river ways to engage in trade c)poor trading products, causing people not to desire the goods others made d) widespread war, causing trade to stop between groups in conflict

I think C

Explanation:

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.

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