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1.1 ! bowersj2 1: \index{Option Response}\textbf{Option Response} problems present foils to the student with drop-down ! 2: boxes. The student can select the matching choice for the foils from a list ! 3: of choices. Optionally, the foils may be bundled into Concept Groups, and ! 4: the system will select one foil from each displayed group to display to the ! 5: student.