Explanation/Reference:
Explanation:
A: In general, one application module instance owns a single database transaction. All changes made through that instance are made in a single transaction, which can be rolled back or committed at any time.
B: Oracle ADF application modules are business components that represent particular application tasks.
The application module provides a data model for the task by aggregating the view object and view link instances required for the task. It also provides services that help the client accomplish the task. For example, an application module can represent and assist with tasks such as:
Updating customer information

Creating a new order

Processing salary increases

Incorrect Aanswers:
D: An application module contains view object instances that retrieve the data needed by the client, as well as view link instances that specify the relationships between the view object instances. The view object and view link instances can be represented by a tree, called the application module's data model.
References: http://download.oracle.com/otn_hosted_doc/jdeveloper/1012/bc4j/intro/bc_aam.html