Three years ago, the U.S. dollar's exchange rate with the Iceland krona was .0008 dollars per krona. Today, the exchange rate was .0006 dollars per krona. These figures indicate that over this three-year period, the dollar A. strengthened against the krona. B. weakened against the krona. C. is not highly correlated to the krona. D. the answer cannot be determined without knowing the number of kronas needed to buy a dollar.