Which of the Following Statements Is True

Multiple Choice

Which of the following statements is true?

A) In the short run, there are no fixed costs, only variable costs.
B) In the short run, there are fixed and variable costs, but in the long run there are only fixed costs.
C) In the short run, there are fixed and variable costs, but fixed costs are the only costs a firm is concerned with.
D) In the long run, there are no fixed costs.