Identify the security feature related to CAS software that enables one to know as to who and what changes have been made in the original data there by helping and fixing the responsibility of the person who has manipulated the data and also ensures data integrity. 

Data Audit

The correct answer is option 2- Data Audit.

Every accounting software ensures data security, safety and confidentiality. Therefore every, software provides the following:
* Password Security
* Data Audit
* Data Vault

Password Security: Password is a mechanism, which enables a user to access a system including data. The system facilitates defining the user rights according to organisation policy. Consequently, a person in an organisation may be given access to a particular set of a data while he may be denied access to another set of data.

Data Audit: This feature enables one to know as to who and what changes have been made in the original data thereby helping and fixing the responsibility of the person who has manipulated the data and also ensures data integrity. Basically, this feature is similar to Audit Trail.

Data Vault: Software provides additional security through data encryption.