Which statement about IPS and IDS solutions is true?

Which statement about IPS and IDS solutions is true?

A.
IDS and IPS read traffic only in inline mode

B.
IDS and IPS read traffic only in promiscuous mode

C.
An IDS reads traffic in inline mode, and an IPS reads traffic in promiscuous mode

D.
An IDS reads traffic in promiscuous mode, and an IPS reads traffic in inline mode.