Which statements best describe the Camp David Accords?

Which statements best describe the Camp David Accords? Check all that apply.

a. They ended all Arab-Israeli conflicts in the Middle East.
b. They were the first peace agreement for Israel in the Middle East.
c. They showed that the PLO could give up violence for negotiation.
d. They showed that Arabs and Israelis could negotiate in good faith.
e. They showed that the US could play an important role in negotiations.