The instance in which data abstraction could be used to improve the program is:
This refers to the data modeling theory which has to do with distinction between the influences when doing data manipulation.
With this in mind, we can see that from the complete text, the instance where data abstraction can be used to improve the program is to store the names of individual students instead of making a single list.
Read more about data abstraction here:
https://brainly.com/question/19484158