Which Statement Is True About SFP

Which statement is true about SFP?

A) SFP modules convert the serial electrical signals to serial analog signals and vice versa.
B) The small form-factor pluggable (SFP) is a compact, hot-pluggable copper module transceiver.
C) SFP modules offer a simple and effective way to connect a single network device to a wide variety of fiber cable types.
D) SFP modules can be classified based on the working voltage and size.