1. What is one of the biggest challenges MOOCs face, according to Doug Clow's research?
2. What aspect of MOOCs did Gerhard Fischer critique in his 2014 research?
3. According to Katy Jordan’s research, what was the typical completion rate for MOOCs with over 10,000 learners?
4. What factors contribute to high MOOC attrition rates? (Select all that apply)