How did the death of archduke franz ferdinand instigate(urge on) the collapse of peace on europe?

i think the answer would happen to be the letter b

because the bar never runs out

couples always argue

worcester v. georgia, legal case in which the u.s. supreme court on march 3, 1832, held (5–1) that the states did not have the right to impose regulations on native american land. andrew jackson refused to enforce the ruling, the decision form the basis for most subsequent indian law in the united states.