To Produce a Firm's Current Output Level,total Cost Is $600,and

To produce a firm's current output level,total cost is $600,and the total variable cost is $450.Therefore,the firm has

A) a marginal cost of $150
B) sunk costs of $150
C) a marginal cost of $1,450
D) total fixed cost of $1,450
E) total fixed cost of $150