Which of the Following Is True of the Algiers Agreement

Which of the following is true of the Algiers Agreement?

A) It was an agreement between Iraq and Algeria that spelled out a plan to settle the Kurds among tribal communities in North Africa
B) It was a net gain overall for the Kurds
C) Iran agreed to close its border to Iraqi Kurds and to cease assisting the Kurdish rebellion in Iraq
D) It addressed Iranian concerns over Iraqi Kurds as well as Iraqi Shi'a