Which of the following statements is TRUE?

1)Customers who shop for airline tickets weeks or months in advance are likely vacation travelers and thus more sensitive to ticket prices.

2)Customers who shop for airline tickets weeks or months in advance are likely business travelers and thus have inelastic demand.

3)Customers who must purchase airline tickets for a flight tomorrow are likely business travelers and thus more sensitive to ticket prices.

4)Customers who must purchase airline tickets for a flight tomorrow are likely business travelers and thus have more elastic demand.