Correct option is B
Option b is the correct order of the given sentences.
C. The child turned to look at her parents - This sentence introduces the child's action of looking at her parents, setting the stage for the interaction.
A. They were not there ahead of him - This sentence adds a sense of anticipation and mystery, as it implies that someone (the parents) is missing.
B. He turned to look on the side - This sentence describes the child's action of looking to the side, which is a natural reaction when someone is searching for someone.
D. They were not there either - This sentence reveals that the parents are also missing from the side the child is looking, confirming the absence of the parents.
The sequence logically follows the child’s action of turning to look at her parents and finding them not present in both directions.