Which had the most influence on the movement of people, goods, and ideas between east and west during the time of the roman empire?

a.
military campaigns on land and sea

b.

trade by sea and over well-built roads

c.
exploratory sea expeditions

d.
immigration from asia and north africa

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.

the 9th amendment

explanation: