If $1.00 U.S. bought $1.40 Canadian dollars in 2006 and in 2010 it bought $1.10 Canadian dollar, then; Question 11 options: a) the U.S. dollar appreciated against the Canadian dollar. b) the U.S. dollar strengthened against the Canadian dollar. c) the Canadian dollar weakened against the Canadian dollar. d) the Canadian dollar appreciated against the U.S. dollar