Which two options are Cisco-recommended best practices for provisioning QoS for
Scavenger-class traffic? (Choose two.)

A.
It should be assigned a higher CBWFQ percentage than bulk data.

B.
It should be marked as DSCP CS1 to mitigate DoS attacks.

C.
It should be assigned a higher CBWFQ percentage than best effort.

D.
It should be assigned a lower DSCP value than best effort.

E.
It should be assigned a higher CoS than bulk data.

F.
It should be assigned the lowest possible CBWFQ value.

Explanation:
http://www.ciscopress.com/articles/article.asp?p=357102&seqNum=5
Scavenger traffic should be marked to DSCP CS1.
Scavenger traffic should be assigned the lowest configurable queuing service; for instance, in Cisco IOS, this means assigning a CBWFQ of 1 percent to Scavenger.