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I am torn on this question. Please help!:

Which method of testing seeks to reduce the effects of racial differences on intelligence test results?

A. Selecting people to oversee the exam who are representative of the racial background of the test-takers

B. Explaining the objective and setup of the portions of an IQ test to test-takers

C. Introducing strict controls such as randomization to reduce subjectivity in test questions

D. Administering the test to a variety of test-takers in a neutral location at the same time of day

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