Although three-year-old Hailey was excited for her new baby brother Blake to arrive, since his birth, Hailey's behavior has changed; she now has occasional toilet accidents, clings to her mother, and has frequent crying outbursts. Hailey is displaying classic signs of ____.

Johnny is a 4-year-old youngster who is having lunch with his mother and sister

When his mother pours the milk that is left in the carton into the children's glasses, she finds that there isn't enough to fill both glasses, so she carefully pours half of the milk in the shorter, fatter glass into a thin, taller glass in front of Johnny's sister. Immediately, Johnny complains that his sister got more milk than he did, and even when his mother tries to explain that they both got the same amount, Johnny insisted he was right. In this example, Johnny is demonstrating a lack of development in the area of a) centration. b) conservation. c) concrete operational thought. d) preoperational thought.

How are over-the-counter (OTC) drugs different from prescriptions?

a) The active ingredients in OTC drugs must have a greater margin of safety than active ingredients in prescription drugs b) The FDA has control over prescription drugs but not OTC drugs. c) OTC drugs face an easier and more streamlined clinical trials process than prescription drugs. d) There is a much higher risk of fatal interactions with prescription drugs than OTC drugs.