Your company's corporate telephony environment is a combination of Skype for Business Server 2015 and traditional Privat

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Your company's corporate telephony environment is a combination of Skype for Business Server 2015 and traditional Private Branch Exchange (PBX). The sites are connected by a Multiprotocol Label Switching (MPLS) topology. There are 6,500 users enabled for Skype for Business Server 2015 video conferencing. You use only the RTVideo for video conferencing. On average, 12 percent of users are on a video conference at any one time. The company plans to add additional bandwidth for all sites.
The company is concerned about the quality of video conferences.
As part of a bandwidth upgrade process, you model real-time transport protocol (RTP) media call flows for video communications that use only RTVideo. You have determined the average number of video conferences and estimated the bandwidth required for the video portion.
You need to allocate the additional bandwidth required when modeling real-time transport control protocol (RTCP).
Which bandwidth option in kilobits per second (Kbps) should you allocate?

A. 10 Kbps per stream
B. 15 Kbps per stream
C. 10 Kbps total
D. 30 Kbps total.