Which group of immigrants do you
think faced the greatest challenges
in the united states? why?

i think it was both the africans and the mexicans because they where the most discriminated races in the united states

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.

the answer to this question is the third option. hope this