After surviving an Amtrak derailment, John experienced frequent, vivid thoughts and images of the accident for several months. He also had problems sleeping and was irritable and withdrawn. John is suffering from ________

a. major depression.
b. posttraumatic stress disorder
c. generalized anxiety disorder.
d. panic disorder.

Answer: b

Psychology

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According to research available to date, the cerebellum is the last structure of the brain to stop growing, some time during emerging adulthood.

a. true b. false

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Three-month-old Royal holds his rattle and shakes it. He is most likely using

A) the pincer grasp. B) the ulnar grasp. C) gross-motor skills. D) prereaching.

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