Which Statement Is NOT True of Language

Which statement is NOT true of language?

A) Primates and other higher-order species have language systems as complicated and expressive as human language.
B) It is the most common variable by which different cultural groups assert their unique identity.
C) It is the main means by which learned belief systems and customs pass from one generation to the next.
D) Language facilitates cultural diffusion and shapes the way people think about, perceive, and talk about the environment.