The correct answer is - B) Saddam Hussein had threatened to invade Saudi Arabia.
Saddam Hussein, the leader of Iraq, was a person that had militaristic and expansionist views in his political leadership. In the 1990's, Hussein decided to attack the smaller country on the south of Iraq, Kuwait. He didn't had any real problems with invading Kuwait considering the superior weaponry and much bigger army. Than he decided that Saudi Arabia should be attacked, and than the international community decided to react, so he didn't managed to do what he wanted.
The goal of Iraq's leader, Saddam Hussein, was to gain as big access to the sea as possible, and to gain as much oil fields as possible, thus he decided to attack the two countries that he and his troops would be able to overcome without any significant problem. Unfortunately for him, his mission failed after the international community intervened.