Answer:
D
Step-by-step explanation:
The airline industry is an example of an oligopoly
An Oligopoly is when there are few large firms operating in an industry. While, a monopoly is when there is only one firm operating in an industry.
Oligopolies are characterised by :
price setting firms
product differentiation
profit maximisation
high barriers to entry or exit of firms
downward sloping demand curve
the action taken by the other airlines is known as tacit collusion.
Tacit collusion is when other companies adopt the price of the price leader
Tacit collusion is not illegal while the explicit collision is illegal.