How did Oda Nobunaga become the first leader to help unify Japan? A. He used military techniques and the recent discovery of guns.
B. He rose through military ranks and was a powerful daimyo.
C. He was a powerful daimyo and used the recent discovery of guns.
D. He rose through military ranks and used the recent discovery of guns.

30 and 44 are b

explanation:

in 550 b.c.e. cyrus the great, the leader of the persians, conquered the medes and united the iranian people under one ruler for the first time. cyrus became the first king of the persian empire and went on to establish one of the largest empires in world.

john smith was the first englishman to sail around the world. francis bacon served as attorney general and lord chancellor of england. he took up aristotelian ideas, arguing for an empirical, inductive approach, known as the scientific method, which is the foundation of modern scientific inquiry.