Examine the following quantitative research question: "Do children who participate in early childhood education programmes learn more when student-centered activities are applied than those who do not use student-centered activities?" (a) What is the independent variable? (2 marks) (b) What is the dependent variable? (2 marks) (c) Develop a relevant research topic from the research question above. (2 marks) (d) Describe how sampling is determined for the research question stated above? (4 marks)