A Major Difficulty with Using ASL to Assess the Ability

Multiple Choice

A major difficulty with using ASL to assess the ability of chimps to learn language is that:

A) the ordering of words is relatively loose in ASL.
B) the ordering of words is very rigid in ASL.
C) ASL speakers are not required to follow the grammatical rules of ASL.
D) there is no way to demonstrate referential understanding using ASL.