Which Research Design Should You Choose If You Were Interested

Multiple Choice

Which research design should you choose if you were interested in exploring children's answers to the following questions: "When can children first understand the notion that germs can cause illness?","At what age do children benefit most from drug education?",and "Do the effects of a training program to reduce prejudice persist over time?"

A) correlational
B) longitudinal
C) sequential
D) microgenetic