In a Study by Steele Involving SAT Items, Simply Having

In a study by Steele involving SAT items, simply having a question about an individual's race in a demographic questionnaire was found to have which of the following effects on minorities?

A) It had the same effect as telling them the test measured their intellect.
B) It was found to be unimportant and ineffectual in affecting performance.
C) It resulted in a decrease in performance on a mental rotation task.
D) It yielded a substantial increase on the speed, but not accuracy, of performance on a number of tasks.