Which fact provides the BEST evidence to support the conclusion that the most important successes of Jimmy Carter's presidency were related to issues of foreign policy and diplomacy?
a.Carter was instrumental in negotiating the Camp David Accords, which directly led to the 1979 Egypt-Israeli Peace Treaty.
b.After Carter allowed the deposed Shah of Iran to enter the United States Iranian militants seized the American embassy in Tehran in November 1979, taking 52 Americans hostage.
c.In 1980 Carter signed a federal law designed to clean up sites contaminated with hazardous substances and also provided for the protection of 79.53 million acres of wilderness lands.EliminateD)In response to the 1979 Soviet invasion of Afghanistan, Carter called for a boycott of the 1980 Summer Olympics in Moscow, which increased tensions between the United States and the Soviet Union.

The answer to choose: A) Carter was instrumental in negotiating the Camp David Accords, which directly led to the 1979 Egypt-Israeli Peace Treaty.

Details:

Thanks to the persistent efforts of President Carter in working with Egyptian President Anwar Sadat and Israeli Prime Minister Menachem Begin, those two leaers signed the Camp David Accords in September, 1978. That led to the 1979 peace treaty between Egypt and Israel that has lasted to the present day. Sadat and Begin were awarded the Nobel Peace Prize in 1978 for their efforts in reaching the agreement that they made.

As to the other answers:

The fact that Carter allowed the deposed shah of Iran to come into the USA for medical treatment did provoke the hostage seizure in Tehran. However, that was not a major success of Carter's foreign policy, but a major mistake. (His advisors had tried to tell him in advance that letting the shah come into the US was a bad idea.)

Similarly, the increase of tensions with the Soviet Union over the Olympics would not be an example of a success.

The federal law regarding cleaning up hazardous waste would be a success item, but one of domestic policy, not foreign policy.