Although the Roots of Tensions in the Middle East Are

Although the roots of tensions in the Middle East are numerous, complex, and not easily resolved, ________ would be most likely to go a long way toward diffusing tension in the region.

A) blocking further Jewish immigration
B) a solution to the continuing dispute over the establishment of a permanent Palestinian state
C) regime change in Iran
D) a sharp reduction in Middle Eastern oil exports
E) None of these answers is correct.