The statements relate to the plan to construct an additional runway at London’s Heathrow airport. Which statement is normative?
- AHeathrow is the UK’s busiest airport and has more flights than any other European airport.
- BThe airport is highly competitive but there is spare capacity.
- CThe potential net benefit of expansion is around £5 billion over 70 years.
- DWe should concentrate on improving the use of existing capacity not build another runway.