The table shows an analysis of responses to four test items. Which test item has the best discrimin Item #1 Item #2 Upper Group 4 Lower Group 7 D. 3 17 6 12 AB Upper Group 21A 3 2 4 6. Lower Group 12 Item #3 C D Item #4 B C Upper Group Lower Group2 423 Upper Group 2 Lower Group 10 II3 6 2 16 a. Item #2 has the best discrimination. b. Item #4 has the best discrimination. c. Item #1 has the best discrimination. O d. Item #3 has the best discrimination.

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