下列哪段程序能够实现线性分组码的编码 A: code = encode(msg,n,k,'cyclic/fmt',genpoly) B: code = encode(msg,n,k,'linear/fmt',genmat) C: code = encode(msg,n,k,'hamming/fmt',prim_poly) D: code = convenc(msg,trellis, puncpat,init_state)