What is the purpose of shaping traffic conditioners in IP QoS?

A.
Shaping reorders transmit queues to offer priority service to specific traffic flows.

B.
Shaping is a non-buffer based solution that drops packets above a specified burst rate.

C.
Shaping techniques monitor network traffic loads in an effort to anticipate and avoid congestion.

D.
Shaping uses packet re-write capabilities to sort traffic and maintain specific data rates for classified traffic.

E.
Shaping avoids delays by smoothing out speed mismatches in the network and by limiting transmission rates.

Explanation:

If the traffic exceeds the contract, one option is to shape the traffic. Shaping just means to buffer or queue the traffic, slowing it down, so that the resulting sending rate is withing the contract.
Reference: DQOS Exam Certification Guide p.130