Effect — Govt. has allowed all the airlines to charge

Effect — Govt. has allowed all the airlines to charge additional amount as peak time congestion charges for the flights landing between 6.00 a.m. to 10.00 a.m.
Which of the following is a probable cause of the above effect ?

1. All the airline companies had threatened to suspend their services during peak hours.
2. The Govt. has increased its tax for peak time flights.
3. The aircrafts are routinely put on hold over the airports while landing during peak time causing extra fuel consumption.
4. The airlines companies can now charge unlimited additional charge for peak time flights.
5. None of these

In order to save the people from getting drowned all the courses of action are necessary.