As part of the higher level course you should have an understanding of competition policy. Most countries have their own competition authorities who look into issues regarding fair competition, and the EU also has an EU-wide authority. There are many examples of companies that have been investigated in the past, and many ongoing issues too. It is always a good idea to have a few case study examples to use in your answers, as well as knowing about competition policy in general. The links below have some good information about competition policy in the European Union.