Which of the Following Statements Is False Regarding the Operating $\beta$

Multiple Choice

Which of the following statements is false regarding the operating characteristic (OC) curve?

A) The OC curve plots the values of $\beta$ versus the values of $\mu$ .
B) The OC curve plots the values of $\alpha$ versus the values of $\beta$ .
C) The OC curve can be useful in selecting a sample size n.
D) None of these choices.