(b) It acquires a complex grammatical structure. The correct statement about Creole is that it acquires a complex grammatical structure.
A Creole language develops from a simplified trade language known as a pidgin when it becomes widely used and learned as a first language by children. Over time, creole languages acquire a complex grammatical structure and a more extensive vocabulary than their pidgin predecessors.
Additionally, creoles often have borrowings from other languages, but they are capable of expressing both basic ideas and complex subjects effectively, contrary to options c and d.