Which of the following is irrelevant evidence for this paper?
a. public schools along the border are dealing with large, mobile populations of students.
b. service jobs in construction and food service count on as much as 50% of their workforce being migrant labor.
c. collapsing economies in honduras and columbia have exerted pressure on mexico, where illegal immigration is taking native jobs.
d. president bush has proposed a new program to make long-time workers american citizens.