A frame relay PVC at router HQ has a CIR of 768 kb/s and the frame relay PVC at router branch office has a CIR of 384 kb/s. Which QoS mechanism can best be used to ease the data congestion and data loss due to the CIR speed mismatch? 

Answer options:

A. traffic policing at the HQ
B. traffic policing at the branch office
C. traffic shaping at the HQ
D. traffic shaping at the branch office
E. LLQ at the HQ
F. LLQ at the branch office

C