Professor Becker designed an IQ test. To validate this test, the professor should be careful to do which of the following? a. Give the test at least twice to the same group to ensure accuracy. b....

Professor Becker designed an IQ test. To validate this test, the professor should be careful to do which of the following? a. Give the test at least twice to the same group to ensure accuracy. b. Select the people in the sample from the population of people for whom the test is designed. c. Select only university professors to take the test so that they can critique the questions on the test. d. Strive to make sure that the test measures what it is supposed to measure.