Which of the following correctly explains the effect of a variable on the labor demand curve? O A. If the quantities of other inputs increase, then we will move up the labor demand curve. OB. If the number of firms in the market increases, then the labor demand curve will shift to the right OC. If the wage increases, then the labor demand curve will shift to the right. OD. If human capital increases, then the labor demand curve will shift to the left, E. If the price of the product increases, then we will move down the labor demand curve