Serbian nationalist from the "black hand " organization assassinated Austrian Duke Franz Ferdinand. why? Explain. Asap ​

answer; /// i believe that the correct answer is (d)the huang he river valley;

he was able to speed up production of the processing of seeds

b. florence

d. milan

well we know that it was fought between america and the united kingdom based on that i assume people consider the second war of independence because brtiain and england (uk)   the uk is made up of england and i assume thats why it was considered that