4. Rory visits the U.S. using a pre-paid and all-inclusive package. He decides, however, to get some pocket money. For this reason, he buys $100 using the exchange rate 1=$1.23. Rory does not spend the pocket money during his trip abroad. When he comes back to the U.K., he can either keep in his wallet $100 or convert into sterling using the exchange rate $1=0.89. What should Rory do? A. Keep $100 in his wallet. In this case, he will make a profit of $7.7. B. Convert $100 into euros. In this case, he will make a profit of euros 7.7. C. Keep $100 in his wallet to avoid making a loss. D. Convert $100 into sterling. In this case, he will make a profit of 7.7