The declaration of faith is the first of the five pillars of Islam, because it is very important. Declaring faith mean being dedicated and loyal to the religion. It means you sincerely believe in Islam, you are willing to follow the beliefs, and that there is no other god but Allah.
Birthrate, death is mortality rate there is the difference.
I think that the answer is D) prosperous, because remember, the Americans won World War 2, and when they won, they brought back with them a period of prosperity and made the United States one of the richest countries in the world.
~Hope I helped!~
