What Was the Premise of the Charkaoui Case

What was the premise of the Charkaoui case?

A) a case that involved hospitals that refused to provide sign-language interpreters to deaf patients
B) a case that involved a Toronto clerk who declined to issue a civil marriage license to gay and lesbian couples
C) a case that involved examining the duties of customs officers, specifically their role in targeting obscene books from entering Canada
D) a case that involved evaluating the process of issuing security certificates to arrest a suspected terrorist living in Canada