Suppose the liquidity preference theory holds. Which of the following is true? A. An upward-sloping yield curve implies that the market is expecting future spot rates (6-month rates) to be higher than the current spot rate. B. A downward-sloping yield curve implies that the market is expecting future spot rates (6-month rates) to be lower than the current spot rate. C. A flat yield curve implies that the market is expecting future spot rates (6-month rates) to be the same as the current spot rate. D. All are true. E. None are true