Chapter 7 of the Charter explicitly authorizes the Security Council to use military force against aggression only if:
Ait is approved unanimously by the General Assembly
Bthe nonviolent means called for in Chapter 6 have failed
Ca peacekeeping operation has been deployed and has failed to prevent the aggressor from advancing or continuing the use of violence
Dit is authorized by a 2/3 majority of the permanent members of the Security Council
Correct answer
B. the nonviolent means called for in Chapter 6 have failed
Explanation
The correct answer is the nonviolent means called for in Chapter 6 have failed.