What percentage of member states must vote in favor for a qualified majority in the Council? option_A: At least 65% of the member states participating in the vote. option_B: At least 55% of the member states participating in the vote. option_C: At least 72% of the member states participating in the vote. option_D: At least 50% of the member states participating in the vote. explanation: According to Article 16(4) of the Treaty on the Functioning of the European Union, since November 1, 2014, in the Council a qualified majority is applied that requires at least 55% of the member states participating in the vote, representing at least 65% of the Union's population. This is the default rule for a qualified majority in the Council, except in special cases such as the reinforced qualified majority.