The European Court of Human Rights was set up at Strasbourg on 21 January 1959. The number of judges of the Court is equal to that of the members of the Council of Europe. The Court’s formation should be reflective of the contracting parties’ different legal systems. To consider a case, the Court sits in single-judge formation, in committees (consisting of three judges), chambers of seven judges, and Grand Chamber of seventeen judges. Therefore, the correct option is A.