Which of the following statements is (are) correct? Regardless of whet

Which of the following statements is (are) correct? Regardless of whether the LM curve is vertical or upward sloping,

a. a money stock target is superior to an interest rate target when the uncertainty facing the policymaker concerns the IS schedule.
b. an interest rate target is always superior to a money stock target when the uncertainty facing the policymaker concerns the IS schedule.
c. both a money stock target or interest rate target provide the same results when the uncertainty facing the policymaker concerns the IS schedule.
d. a money stock target is never superior to an interest rate target when the uncertainty facing the policymaker concerns the IS schedule.

ANSWER

A