Which statements are true of object classes in an LDAP directory? (Choose TWO correct answers)

Auxiliary object classes add optional attributes to an entry but cannot independently provide access to extended schema; they always complement a structural object class.

An LDAP entry can indeed have multiple auxiliary object classes, allowing it to inherit various sets of optional attributes and schema rules.

An LDAP entry is restricted to having only one structural object class, which fundamentally defines its type within the directory schema (e.g., 'person' or 'organizationalUnit'), ensuring a consistent primary definition.

Once an LDAP entry is created, its structural object class cannot be directly altered; to change the fundamental type of an entry, it typically must be deleted and then recreated with the desired structural object class.

Abstract object classes remain fundamental in LDAP, serving as templates for other classes and cannot be directly instantiated as entries themselves.