The Supply Curve of Labor Is Typically Upward Sloping Because

The supply curve of labor is typically upward sloping because

A) a decrease in the wage rate causes workers to work more hours
B) the opportunity cost associated with giving up leisure time rises
C) some workers leave the industry when the wage rate is too high
D) all workers show the same willingness to work at a given wage rate
E) the price of the good rises as more workers are hired and more output is produced