Problem: Which of the following research questions would be best addressed with a group-design? Group of answer choices Does an intensive ABA therapy treatment package alleviate symptoms of autism? How do increases in density of reinforcement affect vocalizations of children with autism? What are the effects of a token economy on disruptive behavior of 3rd graders in Ms. Jones classroom? What are the effects of a time-out procedure on tantrums in 3-year-olds?