Explanation: In his reign he strengthened royal power and limited the authority of the nobility and the church.
When he ascended the throne at the age of 21, he became one of Europe's most powerful sovereigns. He found his domain shaken by incessant feudal struggles since his grandfather's death.
The group which use literacy tests during the post Reconstruction years is the African American and the correct answer among the choices you give is letter D. I hope you are satisfied with my answer and feel free to ask for more if you have a question and clarifications
The answer is A as river valley civilizations relied on rivers as a source of life. River valleys like Egypt, Mesopotamia and Xi, the rivers brought silt and made the soil very fertile, it also brought fresh water and fish to eat. People can also move fast using rivers.