Which of the following statements is true? Select one: O a. Keynesians argue that money is neutral in both SR and LR, while Classical theorists argue that it is neutral only in SR O b. Keynesians argue that money is neutral in both SR and LR, while Classical theorists argue that it is neutral only in LR O c. Keynesians argue that money is neutral only in SR, while Classical theorists argue that it is neutral in both SR and LR O d. Keynesians argue that money is neutral only in LR, while Classical theorists argue that it is neutral in both SR and LR