Every accounting software ensures the following:

(A) Password Security

(B) Data Audit

(C) Data Leakage

(D) Data Vault

Accounting software must have certain essential features to protect and manage financial data properly.

(A) Password Security - Every accounting software must have password protection to prevent unauthorized access to sensitive financial information. This is a fundamental security requirement.

(B) Data Audit - Accounting software must maintain audit trails that track all transactions and changes made in the system. This is essential for compliance, verification, and detecting any irregularities.

(C) Data Leakage - This is not something software ensures or provides. Data leakage refers to unauthorized transmission of data outside the organization. It is a security threat that software must prevent, not ensure.

(D) Data Vault - Accounting software ensures secure storage and backup of data through data vaults. This protects critical financial information from loss or corruption.

The key distinction here is that Data Leakage (C) is a security vulnerability that should be prevented, not a feature that software ensures. The other three - Password Security, Data Audit, and Data Vault - are protective features that accounting software must provide.

Therefore, every accounting software ensures (A), (B) and (D) only.

Correct Option: 1