Based on the provided screenshot of the Object Repository tree structure in UiPath, the correct hierarchy and count of elements are as follows:

There is one Application, which is "ACME 1.0.0".

Within this application, there are two Screens: "Dashboard" and "Login".

Under the "Dashboard" screen, there are three UI Elements: "User Options", "Users Data".

Under the "Login" screen, there are two UI Elements: "LoginButton", "Password", "Username".

Therefore, the correct option regarding the tree structure displayed would be:

C. One Application Two Screens Five UI Elements

This option correctly identifies one application (ACME 1.0.0), two screens (Dashboard, Login), and five UI elements (User Options, Users Data, LoginButton, Password, Username).