The correct answer is B. Giving to charity
A and B are incorrect because they're not part of the 5 pillars. Finding ways to help other who are not as lucky as you is. Living in Mecca is not one of the pillars, but traveling to Mecca at least once in a lifetime is.
America's economy grew by more than 400% between 1860 and 1900 Technological advances, expanding population, improved transportation, financial innovation, and new business practices combined to fuel this economic growth "Titans of Industry".
The causes of the Economic Boom of the 1920s were the Republican government's policies of Isolationism and Protectionism, the Mellon Plan, the Assembly line and the mass production of consumer goods such as the Ford Model T Automobile and luxury labor saving devices and access to easy credit on installment plans.
Cataracts made parts of the riverbed to dry out. The shallows depth and rushing made the river impassable.