29. A firm can borrow from its bank at 10% per year. It determines that the return on investment (ROI) on a new machine is also 10%. The firm's decision to buy the new machine seems ______ now. If the central bank next week announces that it is buying large amount of government bonds in an open market operation, it seems more likely that the firm will decide to ______.
(A) positive/not buy
(B) uncertain/not buy
(C) negative/not buy
(D) uncertain/buy e. positive/buy