Which of the following checklist item should be present in developing performance test items? Select one: a. Administered several short-answer items rather than 1 or 2 extended-response items. b. Utilized conditions, figures and situations which created a realistic problem. c. Administered several short-answer items rather than 1 or 2 extended-response items. d. Trained adequately the observers/scorers so as to ensure that they were fair in scoring the appropriate behaviors.