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What is an important step to prove something is valid or not? determining the reliability observing research testing

Megan is a three-year-old girl. every day, her nanny tells her a story. when her parents get home from work, megan tries to tell them the story. however, she can only retell a few parts of each story. she speaks in short sentences and often plays imaginary games. which type of developmental change is megan experiencing? a. social b. emotional c. physical d. cognitive

What should you do if you have an anxiety attack when your parents aren't home?