To solve this question, the user needs to have knowledge of the OSI model and the purpose of each layer.

Explanation:

ADO.NET is a technology that is used to interact with data sources such as databases. It provides access to data by using .NET objects. The layer that is exemplified by the use of ADO.NET is the Data layer. The data layer is responsible for storing, retrieving, and updating data. It provides a consistent way to access data from various sources.

Now, let's go through each option and explain why it is right or wrong:

A. Association: This option is incorrect because the Association layer is not a part of the OSI model. There are only seven layers in the OSI model.

B. Logical: This option is incorrect because the Logical layer is not a part of the OSI model. There are only seven layers in the OSI model.

C. Presentation: This option is incorrect because the Presentation layer is used to format and encrypt data for transmission between systems. It is not directly related to data access.

D. Application: This option is incorrect because the Application layer is responsible for providing services to the end-user, such as email and file transfer. It does not deal with data access.

E. Data: This option is correct. The Data layer is responsible for storing, retrieving, and updating data. It provides a consistent way to access data from various sources.

The Answer is: E.