Final answer:
The correct answer is option a and e. Collusion occurs when firms collaborate to manipulate prices and profits. In the given options, examples of collusion are two large companies in the soft-drink industry agreeing to raise prices and all hotels in a town increasing prices during a major sporting event.
Step-by-step explanation:
Collusion occurs when firms in an oligopoly market act together to reduce output and keep prices high. The examples of collusion from the given options are:
- a. Two large companies that dominate the soft-drink industry agree with each other to raise their prices.
- e. All the hotels in town increase their prices when a major sporting event is played there.
These two examples represent situations where firms cooperate to manipulate prices and profits, which is the essence of collusion.