The governor of California is worried about the increasing number of traffic accidents in her state. She decides a new policy is needed to solve the problem. She has identified the , so her next step is to form to study the accidents. This group recommends a solution: lowering the speed limit in the areas where the accidents are most common. The legislature passes such a law and sets up . The Department of Transportation and local law enforcement are given the and tools to enforce the new speed limits.

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.