A New Tribe Has Recently Been Discovered in the Rainforest

Multiple Choice

A new tribe has recently been discovered in the rainforest. As a linguist, you want to determine if they have a language. Which of the following is essential for you to conclude that language was present?

A) Relativity
B) At least 25 phonemes
C) No morphological structure
D) Displacement
E) Common roots with an existing language