The four remarkable classics in TCM history are_________.

A、Huangdi’sInternalClassic,PulseClassic,TheClassicofDifficulties,Shennong’sClassicofMateriaMedica
B、Huangdi’sInternalClassic,TheClassicofDifficulties,Shennong’sClassicofMateriaMedica,A-BClassicofAcupunctureandMoxibustion
C、Huangdi’sInternalClassic,TheClassicofDifficulties,TreatiseonColdDamageandMiscellaneousDiseases,Shennong’sClassicofMateriaMedica
D、Huangdi’sInternalClassic,TheSynthesisofChineseMedicine,TheClassicofDifficulties,Shennong’sClassicofMateriaMedica