According to lecture, it seems that other animals such as chimpanzees $\_\_\_\_\_\_$ because $\_\_\_\_\_\_.$

A$.$ can develop language; they show propositional thought

B$.$ can develop language; syntax seems to be present

C$.$ cannot develop language; they can not even demonstrate the basics

D$.$ can not develop language; there is no real syntax

E$.$ can develop language; all isolated children can as well