Which Statements Does NOT Accurately Describe the Ability of Animals

Which statements does NOT accurately describe the ability of animals to acquire language

A)  The ability to use language-in a very basic, primitive way-may not be entirely unique to humans. 
B)  Animals have never shown behaviour that suggests an understanding of grammatical rules. 
C)  Questions remain concerning whether the language-like behaviour of animals demonstrates all the critical properties of language. 
D)  Some language-like skills have been taught to a number of species.