The Figure Below Shows the Isocost Lines and the Isoquant

Multiple Choice

The figure below shows the isocost lines and the isoquant map for a firm producing golf tees.
FIGURE 8- 6
-Refer to Figure 8- 6.At each of points A,C,E and G on the isoquant map we know that

A) the ratio of the marginal utilities of capital and labour is equal to the ratio of the prices of capital and labour.
B) the firm is at its cost- minimizing position for an output level of 4000 golf tees.
C) the firm can adjust its employment of factors to reduce its total cost,with output unchanged.
D) the firm has adjusted the factor prices to equate the ratio of marginal products of the factors.
E) the ratio of the marginal products of capital and labour is equal to the ratio of the prices of capital and labour.