Which of the following is true of working within a Sensitive Compartmented Information Facility (SCIF)?
a. Scif access does not require any background checks or security clearances.
b. It is acceptable to share scif access codes with unauthorized personnel.
c. Any individual can freely enter a scif without authorization.
d. Authorized personnel who permit another individual to enter the SCIF are responsible for confirming the individual's need-to-know and access.