Question 13 O Mark this question Which statement below regarding expansions is true? O They happen when GDP reaches its highest point. O They occur when the economy is experiencing GDP growth. O They happen when GDP reaches its lowest point. O They occur during times of high rates of unemployment.Question 14 0 Mark this question Which statement below is true regarding aggregate supply? 0 It is influenced by the wealth effect. 0 Two curves represent AS. 0 AS has no quantity limit. 0 It is not used that often in macroeconomics. Question 15 0 Mark this question If the price of a gallon of gasoline in California was $0.99 in 1997 and is currently $3.69, prices have increased by which factor below? 0 .72 O 373 O -3.73