Need help in deciding with data structure to use for my project?? (C++)?

The thing between “” is the project description, i need to know which data structure is best and most efficient to use for this project…
Allowed data structures:
-List (linked or array-based)
-Binary trees
-binary search trees
-Heaps
-Graphs
And also plz give me a reason for your choice… thanks a lot
”
In this project, you are requested to develop a software system [...]

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