The United States experienced a recession which lasted for more than a year in the late 2000s. How did this recession most likely affect its trade partners Canada and Mexico?

a. Their economies were not affected by this problem.

b. They had some economic decline because of lower US spending.

c. Their economies grew because consumers could by US products more cheaply.

d. They had major economic problems because they could no longer consume the goods they needed.

Is this b? I'm a little confused.