Demonstrate correct use of articles and prepositions. The students walk five kilometers to school, so they need to get up very early _ the morning.

Explanation

Option A: On indicates touching and being supported by the top surface of something or moving to a position supported by something. for example, The book is lying on the tableThere is a lot of frosting on the cake Option B: In is used to indicate location or position within or inside something and time We went for a swim in the lake They have a house in the country Option C: Out is used to show movement away from inside of a place or container She open the window and stuck her head out Option D: The bag broke and the apples fell outOf is used when we want to show that people or things relate to other things or people