Which of these was an effect of the terrorist attacks of september 11, 2001, on the current federal immigration guidelines
a. an increase of student visas to foster cultural understanding
b. the implementation of a quota system derived from the us census of 1910
c. more severe guidelines for visa applications and more stringent enforcement of immigration law
d. a political shift of the responsibility for immigration control from the federal government to the states

From the moment the first plane hit the North Tower, the immigration system in the United States was destined to change. 

The attacks on September 11, 2001 certainly didn't start the country's immigration debate, but it did alter the course of the discussion. 

Immigration was already a staple of the nightly news through the 1990s into the 2000s. After a series of free trade agreements realigned economies in Mexico and Central America, millions of migrants headed to northern Mexico and the U.S. looking for work.

a countries leader should be motivated by the common good of the country.