Exam 350-801 topic 1 question 290 discussion

The 4/5 class model is the simplest of the three models in terms of QoS polices and typically accounts for real-time communications, call signaling, critical data, best-effort data, and scavenger data. The call signaling and critical data are often grouped together as a “mission-critical” category, thus this model is called the 4/5 class model. CCNP and CCIE Collaboration Core CLCOR 350-801 Official Cert Guide Chapter 13: Layer 2 and Layer 3 QoS Parameters.

Answer is B look at the information on Kevin Wallace Course QoS recommendation module.

it should B. https://www.ccexpert.us/qos-implementing/qos-baseline-expansion.html

Correct Anser is B: https://2020.mmnog.net/pdf/20T208%20Introduction%20to%20QOS.pdf

B https://www.cisco.com/en/US/technologies/tk543/tk759/technologies_white_paper0900aecd80295a9b.pdf

B is the answer. CLCORE book page 310

I would go for B