You are the server administrator for your organization, which has contracts to store sensitive data for clients which want reassurance that youre protecting their data. The company has groups of employees who will be working with clients, and several contractors need access to the data, too. To make managing data easier, each client has been assigned his or her own disk volume. What types of auditing can you set up to reassure clients their data is protected and to check which files employees and contractors are accessing?