You are an enterprise application developer. You are testing authentication in a Microsoft Windows-based application.
After the user enters the user name and password in the logon form of the user interface component, the following responses are triggered:

* The user interface component passes the user name and password to a utility component that performs the encryption.
* The user interface component then passes the encrypted user name and password to a Web service.
* The Web service invokes a business component and passes the encrypted user name and password.
* The business component passes the encrypted user name and password to a data access layer component that validates the user.

You need to identify the component on which the business component depends.
Which component should you choose?

A.
Utility component

B.
User interface component

C.
Data access layer component

D.
Web service component