Label the Items Below as One of These Requirements for a Just

Short Answer

Label the items below as one of these Requirements for a Just War: Just Cause (JC), Proportionality (P), Last Resort (LR), Right Intention (RI), Discrimination (D). Also tell whether the requirement is one for going to war ( Jus ad Bellum : JAB), or conduct in war ( Jus in Bello : JIB).
This requirement makes bombing of civilian populations unacceptable.