Dr. Franklin wants to study the accuracy of eyewitness testimony. He will tell his subjects that they will take a paper and pencil test and have them sign forms to agree to participate. He will then tell them he left their test papers in his office and will be back in a few minutes with them. While he is away, one of his research assistants will run into the room and steal something from the professor's desk and run back out again. Dr. Franklin will then come back in, hand out the test papers, and ask the participants to describe the suspect in detail. Dr. Franklin will explain what occurred after he collects the participants' papers.

According to the federal regulations, which of the following studies meets the definition of research with human subjects? a. a researcher uses the customs office’s passenger lists for ships bringing immigrants to the us between 1820-1845 to track the numbers of immigrants from certain ethnic groups.b. a researcher conducts a linguistic study of comments posted on a local public blog.c. a developmental psychologist videotapes interactions between groups of toddlers and their care givers to determine which intervention methods most effectively manage aggression.d. a researcher asks the director of a local free clinic about the number of patients in the last two years with newly diagnosed hiv/aids.