Geography · Latitudes and Longitudes

A teacher asks her class, 'What would happen if humans decided to keep a single clock for the whole world, without separate time zones?' Four students respond as follows: Student 1: Longitudes would no longer be of use. Student 2: The seasons in different parts of the world would change. Student 3: All parts of the world would have day and night together. Student 4: For some countries, morning would be at 5 o'clock, for some at 7 o'clock, and so on. Arrange the four students in INCREASING order of conceptual clarity.