The correct answer is C. Our strength is our unity of purpose.
Both excerpts aim to show that only united people can overcome difficulties. Roosevelt had to lead his people out of the Great Depression, and Lincoln out of the Civil War. So both times people had to endure difficult times, and their Presidents wanted them to be united for that.
A. Ratification of the Constitution
Explanation:
Islam has influenced Cardoba and West Africa in the east to Indonesia in the West so it's not easy to give a brief answer since the details are specific to social/cultural/economic context of local environs.
