First of all, Empress Wu, also known as Wu Zetian (624–705) was the only female emperor in China's history. She ruled the Tang Dynasty as empress (655–690), and then as Emperor for 15 years, in the seldom-mentioned Zhou Dynasty. During her long reign totaling 50 years, the empire became relatively stable, peaceful, powerful, and prosperous.
Secondly, There were four reasons leading to Tang's decline, among which the dominance of the eunuchs, the separatist regions of Fanzhen and clique conflicts were internal factors while peasants' uprising was the external factor. Moreover, as the dominance of eunuchs became serious, the military power of central regime was weakened.
Finally, printing, paper money, porcelain, tea, restaurants, gunpowder, the compass, and all of the things that Chinese of the Song Dynasty (A.D. 960-1280) gave to the world is AMAZING!
Well, they had discovered foods that haven't seen before, also their life was a little harsh because they didn't know about the new world, they where seeing plants and animals like the pig they haven't seen before. Another thing is that their life was kind of rich because they recruited natives from the area to work for them.
Ensuring C) domestic tranquility means ensuring peacefulness or calmness. Domestic tranquility refers to peace to peace at home. It can be applied to family as well as to states. When referring to states domestic tranquility refers to peace kept among states as set out in the Constitution. It includes the federal governments rights to end rebellions and smooth out tensions between states.
Hii the answer would be C
Hope I helped
