Unlike radiation where each of the derived meanings is directly connected to the primary meaning, （ ）describes a process where each of the later meaning is related only to the preceding one like chains.

Unlike radiation where each of the derived meanings is directly connected to the primary meaning, （ ）describes a process where each of the later meaning is related only to the preceding one like chains.

A.back-formation

B.concatenation

C.association

D.extension

正确答案是B