Which statement about the VideoStream/Multicast Direct feature is true?

The true statement about the VideoStream/Multicast Direct feature is that each VideoStream client acknowledges receiving a video IP multicast stream. This feature enhances the reliability of IP multicast traffic over WLAN by using client acknowledgments to ensure delivery.

References := ( CCNP Enterprise Wireless Design ENWLSD 300-425 and Implementation ENWLSI 300-430 Official Cert Guide )