What is the most likely cause of this?

After modifying the indexes for a database in slapd.conf and running slapindex, the slapd daemon refuses to start when its init script is called.

What is the most likely cause of this?
A . The indexes are not compatible with the init script.
B . The init script cannot be run after executing slapindex, without first signing the indexes with slapsign.
C . The init script has identified one or more invalid indexes.
D . The init script is starting slapd as an ordinary user, and the index files are owned by root.

Answer: D