question

A linguist recently argued that all human languages must have a common origin because some concepts are universal; that is they appear in all languages. For example, all languages are capable of describing lightness and darkness.

Which one of the following, if true would most senously weaken the argument?

A) The Bernese language does not contain basic nouns like automobile and airplane.
(B) No one linguist could possibly speak all known languages.
(C) All speakers, regardless of their languages are confronted with similar stimuli like lightness and darkness.
(D) The similarity between human language and dolphin language has not been attributed to a common origin.
(E) Some languages include concepts of which speakers of other languages are not even aware.

Which the above is the correct answer? and why?

Thank you