What is one ongoing obstacle to peace between israel and palestinian arabs?

a. israel will not give up its settlements on the sinai peninsula
b. palestinian refugees want to return to the land they left in israel
c. the plo continues to deny israel's right to exist
d. jordan and syria have refused to negotiate with israel

C. The PLO continues to deny Israel's right to exist is your answer.

There has been numerous peace talks, however, the PLO continues to decline each one and continue the war (even though they stated that Israel started it, which is false). Israel fights a defensive war, and has offered to give agreements each time, in which they are not as favorable to Israel at all time, but Palestine does not accept anything short of elimination of the state of Israel. This puts PLO as being considered as a terrorist organization, and had been treated as such by Israel.

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