What is pidgin?

a. a partial language that results from primitive tribes' attempts to learn the language of a modern industrialized state
b. a mixed language that develops to ease communication between members of different cultures in contact, usually in situations of trade or colonial domination a rhythmic sublanguage present in any human language as the result of a .universally shared mutation
c. set of languages believed to be most like the original human language, spoken by a small population of Indian Ocean islanders metalanguage, developed by computer programmers, that has yielded valuable insights into the workings of the human brain