Why Would a New Limit on Trade in Goods with the United

Why would a new limit on trade in goods with the United States by Canada be more important to the U.S.economy than the same type of policy in Italy?

A) Canadians speak English so U.S. citizens are more interested in what they do.
B) Canada ranks behind only the United Kingdom as our second most important trade partner.
C) Canada is the U.S.' largest trading partner.
D) Canada exports most of the hockey players who play for the National Hockey Leagues.