What did the leaders of OPEC realize
after the resolution to the oil embargo
in 1974?
A. The U. S. is self-reliant.
B. The U. S. won't back Israel.
C. The U. S. weakness is oil.
D. The U. S. does not need
OPEC.

D. The U.S. does not need  OPEC.

Explanation:

The embargo caused the United States and western European countries to reassess their dependence upon Middle Eastern oil. It also led to far-reaching changes in domestic energy policy, including increased domestic oil production in the United States and a greater emphasis on improving energy efficiency.

(I may be wrong but I believe that this is right)

the manhattan project's indispensable man