You are designing the custom dimensions for your FM application. Identify the true statement.

In Oracle Hyperion Financial Management (HFM), Custom dimensions allow detailed tracking of account balances, such as product lines or geographic regions. To restrict or specify which Custom dimension members or sub-hierarchies are valid for a given Account member, administrators use the Account dimension properties: Custom1TopMember, Custom2TopMember, Custom3TopMember, and Custom4TopMember. By designating a specific top member for a Custom dimension on an Account, HFM restricts data entry and consolidation for that account to the designated branch of the Custom dimension hierarchy. This property assignment ensures data integrity by preventing users from entering data into invalid combinations of accounts and custom dimension members across the application.

A. Custom dimensions in HFM are flexible and can be shared or reused across multiple accounts and analytical purposes within the application.
B. Custom dimension hierarchies are not automatically available to all accounts; validity is governed by the Top Member properties defined on each account.
D. Custom dimension hierarchies do not require symmetry; parents can have varying numbers of children and differing structural depths.
E. Different accounts can be assigned different Custom Top Members, thereby linking distinct accounts to entirely different custom hierarchy branches.

1. Oracle Corporation, Oracle Hyperion Financial Management Administrator's Guide, Release 11.1.2.4, Chapter 3: "Setting Up Dimensions," Section: "Account Member Attributes: Custom Top Members," pp. 3-25–3-28.

2. Oracle Fusion Middleware Documentation, Financial Management User's and Administrator's Guide, "Defining Custom Dimension Validity via Account Attributes," Section 5-14.