Which two statements describe a transcoder?

Which two statements describe a transcoder? (Choose two.)
A. Transcoders can only connect two streams of the same codec type that use different sampling rates.
B. Transcoders may operate as a Media Termination Point when the codecs are of the same sampling rate but use different codec types.
C. Transcoders may be combined with conferencing resources on a single DSP to conserve resources.
D. Transcoders can convert an input stream of one codec to an output stream that uses a different codec type.
E. Transcoders convert lower bit rate streams to higher bit rate streams.