A midyear burst of​ minimum-wage increases starts on July 1
On July​ 1, 2016, the minimum wage will increase in 14 U.S.​ cities, states and​ counties, and in the District of Columbia. In San​Francisco, the minimum wage will rise to​ $13.00 by 2018.
​Source: The Wall Street Journal​, July​ 1, 2016
The rise in the minimum wage​ _______.
A. increases aggregate supply because when workers receive a higher wage​ rate, they work harder
B. decreases aggregate supply because​ firms' costs increase
C. creates a movement up along the aggregate supply curve because the price level rises
D. does not change aggregate supply because most people earn more than the minimum wage