Why is the forth of july an important holiday for americans a)the battle of lexicon b)the first continental congress met c)cornwallis surrendered to washington d)the declaration of of independence

How are the republican and democratic presidential candidates chosen? a. they are nominated by their state governments. b. each is nominated by his or her respective party. c. each is chosen by the governor of his or her home state. d. they are chosen by the house of representatives.