How do Republicans and Democrats choose candidates for president? A. The candidates are chosen by their parties' elected office holders. B. The candidates are nominated through claims of birthright. C. The candidates are nominated at their party's national conventions. D. The candidates are chosen by a vote of the Electoral College.

The candidates are nominated at their party's national conventions.

Explanation:

Delegates to each party's national convention vote to nominate the candidates for president and vice president. Delegates are chosen by the approved procedure in each state. Most states choose delegates in primary elections, but some are chosen in state party caucuses or state party conventions.

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.