Answer:
Step-by-step explanation:
B is out because we are only dealing with Currency, what government officials will do.
I would pick C. You have to worry about what banks are going to do when they exchange funds. You also have to be concerned about the currency does.
For example The Canadian dollar is worth about 78 cents American.
If the Canadian Dollar drops to 70 cents and the American dollar goes up 10c
The new spread is 8+ 10 = 18 cents. That can cost you a lot of money that you weren't counting on.