An Item Analysis Yields the Following Results for a Multiple-Choice

Multiple Choice

An item analysis yields the following results for a multiple-choice item (alternative A is the correct answer) : Number of students in the upper and lower scoring groups on the total test choosing each alternative.
Alternative A* B C D Omit Total
Upper Group 3 1 5 1 0 10
Lower Group 6 2 0 1 1 10
Which one of the following statements is NOT justified by these results?

A) The item should be reviewed for possible miskeying.
B) The item has negative discrimination.
C) The item has a difficulty of 45%.
D) The item is invalid.