The correct answer is C. Lightweight Directory Access Protocol.
LDAP is an application protocol for accessing and maintaining directory services. A directory service is a database that stores information about objects, such as users, groups, and computers. LDAP is a standard protocol, which means that it is supported by many different directory services.
LDAP is a lightweight protocol, which means that it is efficient and easy to use. It is also a directory access protocol, which means that it is designed for accessing directory services.
The other options are incorrect. A is incorrect because it is not a valid acronym for LDAP. B is incorrect because it is not a standard protocol. D is incorrect because it is not a directory access protocol.