907 Jewish refugees aboard the MS St. Louis were denied entry to Canada. The ship returned its passengers to safe harbour in four European countries.
I would say your answer is creating tension. the rest dont seem to work since refuting a counterclaim will make the argument weaker, but it will help the story, not bring it down. it obviously doesnt make the argument stonger, and the main purpose is for the audience to see both sides. so my answer would be creating tension. hope this helps