The text argues that if apple growers in the United States can produce apples cheaper than apple growers in Canada, this will not reduce total jobs available in Canada. The logic underlying this argument is that

a	apple growers in Canada did not earn much anyway.
b	apple growers in Canada are welcome to emigrate to the United States.
c	apple growers in Canada will switch to specializing in a crop in which they hold the comparative advantage.
d	apple growers in the United States need the jobs more than Canadians do.