4) President Jimmy Carter felt that the most serious problem related to
the U. S. Economy was the Nation's dependence on
a. coal
b. foreign oil
c. the federal government

B

Explanation:

the answer is froeign oil He had a dependance on fereign oil

B. foreign oil

Explanation:

The United States relies heavily on oil imported from many countries in the Middle East that produce copious amounts of it each day. Unfortunately, when the US supported Israel in the Yom Kippur War, many Arabic countries became enraged and placed an embargo (or a prohibition of ships to leave the harbor) on ships carrying oil to the US. Soon there was a shortage of oil in the US, and this was known as the Energy Crisis.

The president at the time, Jimmy Carter, felt the need for Americans to avoid such a situation in the future and stop depending on foreign oil so much.

Thus, the answer is B.