Answer:
the sailboat
Explanation:
sailboats we're invented in order to expand sumerian trade
Fujiwara Family: Dynastic family that, by shrewd intermarriage and diplomacy, dominated the Japanese ... the Fujiwara rise to power was gradual, its founding in the 7th century foretold its future role and importance.
I got the answer wrong so I just deleted all of it just look at the one above mine.