In this technological age, today's students are faced with on-line educational opportunities at both the high school and post-high school level. Many educators wonder how effective such on-line courses really are. Imagine you are an educator designing an on-line course. Before beginning, you decide to conduct a study about the effectiveness of on-line courses. Which research question would be MOST appropriate to guide your study? A) What are the strengths and weaknesses of on-line courses? B) How do students' grades compare in on-line versus traditional courses? C) How do standardized exam scores of on-line courses compare with standardized exam scores of traditional courses? D) How does course completion of on-line courses compare with completion of traditional courses?