Susan, some students are also just so competitive that they will argue a point that they even know they may not win simply to see if they can turn the decision in their favor. There are many testing systems in a number of industries where there may be several answers that are close to being correct but one will always stand above the rest. In the world of technology and Microsoft Certifications, this is the case and the industry exams will always have one best answer with the others being very close. This is done to ensure the test takers have actual knowledge of a system versus just book knowledge. You are doing your students a great service preparing them for such assessment instruments they may encounter in the "real-world". James Jackson