Which prenatal diagnostic technique has the highest risk of inducing an accidental miscarriage?

Which of the following, according to Freud's theory, would likely be the cause of starting harmful rumors about someone at work?

a) the ego ideal b) an unsuccessful resolution of the latency stage c) the death instinct d) the superego

John received a score of 90 on an intelligence test. Two days later, he received a score of 55 on a different form of the same test. The test was apparently lacking in ______

a. alternate-form reliability c. test-retest reliability b. content validity d. criterion-related validity