In 2014, Amazon.com considered raising the annual price of its Amazon Prime shipping and streaming-video service from $79 to $99 per year, a 25% increase. Such a price increase would be the rst in this program's nine-year history. Let the gure to the right show the demand for Amazon memberships per year in millions. Using the letters in the graph (A, B, and C and a + or - sign where appropriate), what area represents Amazon's original revenue, before any price increase? Amazon's revenue when the price is $79 is D. f5 (.0 (.0 p, $ per member 20 D Q, Millions members per year