Which of the following statements give a valid reason why the currency exchange you plan ahead of time might not be wholly accurate? I. Currency exchange rates fluctuate, so the actual rates could be different from the planned rates. II. Many currency exchange services charge a fee or surcharge, which differs from service to service. III. Taxes in different countries may cause the amount of money you actually receive to change. A. I and II b. II and III c. III only d. I, II, and III.