Thanks in advance!

Durian is a fruit that is particularly popular in Singapore and Malaysia. Durian has a very strong smell, which many people dislike. As a result, the Singapore Mass Transit Authority bans people from carrying durians on Singapore's trains. 1. Transporting durians on the train has economic implications for passengers. 2. If the Singaporean Mass Transit Authority did not intervene then it is likely durians would continue to be transported on its trains. 3. The smell of durian is an example of a negative externality. Which of the above statements are true: Only 1 is true. Only 2 is true. Both 1 and 2 are true. Both 2 and 3 are true. All three are true