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According to the federal regulations, which of the following studies meets the definition of research with human subjects? a study of twenty 4th grade classrooms in which researchers ask the schools to systematically vary the time of day reading is taught, and collect weekly assessments of reading comprehension for each child over a three-month period.the collection of data, by a playground designer hired by the superintendent of schools, about the physical dimensions of school playgrounds, presence of fencing, and the kinds of equipment currently provided.a feasibility study for implementing a year-round school program, focusing on economic issues such a facilities utilization and transportation costs.an analysis of aggregate data comparing statewide high school graduation rates provided by the state department of public instruction, using county tax information.

What was jimmy carter's political experience prior to becoming the president? he was both a lieutenant governor and secretary of state. city commissioner and director of the cia. he was a state senator and governor. secretary of the navy and state senator. next question @ ask for

Pedestrians,cyclists,skateboarders,and highway construction workers are know as?