Which statement about traffic policing and shaping is true?

Which statement about traffic policing and shaping is true?

A.
Shaping limits traffic rates by dropping, re-marking, or transmitting traffic.

B.
Policing involves regulating excessive traffic rates by delaying (that is, buffering) traffic.

C.
Traffic policing and shaping help regulate bandwidth usage by limiting the amount of traffic.

D.
Traffic policing is more suitable for lower-speed links such as Multilink PPP and Frame Relay, as
it buffers excess traffic.