Which of the following is the correct syntax for including a schema file in slapd.conf?
A. include /usr/local/etc/openldap/schema/core.schema
B. allow /usr/local/etc/openldap/schema/core.schema
C. permit /usr/local/etc/openldap/schema/core.schema
D. add /usr/local/etc/openldap/schema/core.schema