How did the plo undermine diplomatic efforts between arab nations and israel?
by establishing a blockade along the gaza strip
by engaging in terrorist activities on israeli targets
by assassinating israeli and arab leaders involved in peace talks
by challenging the right of the palestinian national authority to govern

The PLO undermine diplomatic efforts between Arab nations and Israel by engaging in terrorist activities on Israel targets.

Option B

Explanation:

PLO means Palestine Liberation Organization which was formed in 1964 and it is mainly found for the liberation of Palestine with the help of armed force and their major targets are the Israel citizens. They continuously tend to target them and became the sole legitimate representative for the Palestine people.

Hence it is considered as a terrorist organization by them and thus the PLO engaged in terrorist activities on Israel targets and this undermined diplomatic efforts between the Arab nations and the Israel.

Answer is B: by engaging in terrorist activities on Israeli targets

Explanation:

a and c?

i think it is a and c

polisit can also mean a body of citizens. in modern historiography, polis is normally used to indicate the ancient greek city-states, like classical athens and its contemporaries, and thus is often translated as "city-state". the body of citizens came to be the most important meaning of the term polis in ancient greece.