Explanation/Reference:
Apache Sentry is a new project that delivers fine grained access control; both Cloudera and Oracle are the project's founding members. Sentry satisfies the following three authorization requirements:
Secure Authorization: the ability to control access to data and/or privileges on data for authenticated users.
Fine-Grained Authorization: the ability to give users access to a subset of the data (e.g. column) in a database
Role-Based Authorization: the ability to create/apply template-based privileges based on functional roles.
Incorrect Answers:
C: The file /etc/sudoers contains a list of users or user groups with permission to execute a subset of commands while having the privileges of the root user or another specified user. The program may be configured to require a password.
References: https://blogs.oracle.com/datawarehousing/new-big-data-appliance-security-features