Answer:d. Approval to move forward must be unanimous among other nations.
Step-by-step explanation:
The condition that's not required to justify war is that the approval to move forward must be unanimous among other nations.
To justify war, the force must take more lives than it takes or injures, the violations must be knowable to all, systematic and widespread.
To justify war, there should not be an approval to live forward and start war.agreement among other nations.