Which of the following statements would be the most appropriate description of sustainable development in the aviation sector?

1. Aviation is economically and socially sustainable, but not environmentally sustainable.
2. Aviation is socially sustainable, but not economically or environmentally sustainable.
3. Aviation is economically sustainable, but not environmentally or socially sustainable.
4. Aviation is economically and environmentally sustainable, but not socially sustainable.

Privatisation within the airport industry has taken various forms. Which of the following options offers the most accurate list of these airport models of privatisation?

1. Sole control and government subsidised.
2. Consortium of investors and price capping.
3. Trade sales, private-public partnerships and management contracts.
4. Economic regulation, traditional operators and international joint ventures.

The concept of vertical integration is best described by which of the following statements:

1. The more control you have over your value chain, the more competitive your business is likely to be.
2. The less interaction your company has with others, the more customer focused your business can be.
3. Developing vertical knowledge systems within an centralized to ensure control and decision-making is centralized.
4. Creating a team of people who represent all levels of the vertical hierarchy organisational structure to develop innovative products.