Eight-month-old baby lucy picks up a toy in her crib and accidentally hits her crib with the toy, making an interesting noise. she begins to drag the toy back and forth against the sides of the crib's railing, producing another different and interesting sound. this prompts lucy to continue repeating the action over and over again. piaget would say that this is an example of

Which examples are relevant sources for students to use in research? check all that apply. a journal entry written by a professor who is considered an expert a report written by an independent government source a presentation by a company that includes paid information a document published by a renowned organization a scientific paper put out by a non-profit organization a blog whose author tries to sell a product or service